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Volume 41 (1976)
- Issue 6 Pages 1821-
- Issue 5 Pages 1445-
- Issue 4 Pages 1093-
- Issue 3 Pages 729-
- Issue 2 Pages 361-
- Issue 1 Pages 1-
Predecessor
- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
- Proceedings of the Tokyo Mathematico-Physical Society. 2nd Series
- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
- Tokyo Sugaku-Butsurigakkwai Hokoku
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku-Butsurigaku Kwai Kiji
- Tokyo Sugaku Kaisya Zasshi
Volume 41, Issue 2
Displaying 1-50 of 68 articles from this issue
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Tetsumi Tanabe, Katsuji Koyama, Masaharu Yasue, Hideaki Yokomizo, Kenj ...1976 Volume 41 Issue 2 Pages 361-367
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe nucleus 12C was bombarded by 82.1–MeV 3He particles to study elastic and inelastic scattering and the (3He, α) reaction. Angular distributions were measured for the elastic scattering, for the inelastic scattering to levels at 4.4, 7.6 and 9.6 MeV in 12C, and for the (3He, α) reaction to levels at 0.0, 2.0, 4.3(4.7) and 6.4 MeV in 11C. The optical potential parameters were searched for to fit the 3He elastic scattering angular distribution. The deformation parameters β2 and β3 for 12C were determined from DWBA analysis. The angular distributions of α particles were compared with DWBA calculations and calculations including the two-step process via inelastic channel.View full abstractDownload PDF (724K) -
Daijiro Yoshioka, Sadao Nakajima1976 Volume 41 Issue 2 Pages 368-372
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWith use of contact interaction between carriers and Hartree-Fock approximation, a gas-liquid type first order phase transition of semimetals in a strong magnetic field is studied for an arbitrary configuration of electron and hole Landau levels with arbitrary effective masses. The results are in qualitative agreement with the recent experiment on Bi.View full abstractDownload PDF (524K) -
Daijiro Yoshioka, Sadao Nakajima1976 Volume 41 Issue 2 Pages 373-377
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe ground state energy of an electron-hole liquid in a strong magnetic field is calculated using Hartree-Fock and Hubbard approximations. A numerical estimate of the condition for a gas-liquid type first order phase transition is given, and compared with the recent experiment on Bi by Yosida et al.View full abstractDownload PDF (524K) -
Masaharu Hamazaki, Setsuro Asano, Jiro Yamashita1976 Volume 41 Issue 2 Pages 378-387
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe KKR formalism is developed to calculate the Green function of the muffintin system, which gives more general way to calculate the electronic structures of imperfect crystals. For the impurity state, the formulae are given to calculate the local density-of-states, the scattering matrix and the phase shift of the impurity on the basis of the energy band calculation by KKR or APW method. For the disordered state it is shown that any approximation developed in the Koster-Slater formalism, the CPA for example, may be easily translated into the corresponding one in the KKR formalism.View full abstractDownload PDF (1088K) -
Yukio Saito1976 Volume 41 Issue 2 Pages 388-393
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA double-Gaussian approximation method is introduced to treat the relaxation process in a bistable system with two stable and one unstable states: An initial single-peak distribution is assured to relax to the equilibrium double-peak distribution in a cooperative macro-system. If the initial peak stays far from the unstable point, the logarithm of the relaxation time for the appearance of double-peak is very long and proportional to the size N of the system: The single-peak distribution is metastable. If the initial peak stays at the unstable point, the relaxation time is proportional to log N. In this case, further, fluctuation increases anomalously to the order of unity in the intermediate stage.View full abstractDownload PDF (696K) -
Mitsuru Matsuura1976 Volume 41 Issue 2 Pages 394-399
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPolaron effects on the surface electron in polar semiconductors are discussed. The variational method is used to derive expressions for the self-energy shift and the corrected mass under the influence of both surface and bulk longitudinal optical (LO) phonons. The results are applied to the semiquantitative study of polaron effects on the intrinsic surface electron state in materials such as GaAs and CdS. It is found that (i) the surface LO phonon has substantial effects on the surface electron, especially in the mass correction, and (ii) the bulk LO phonon effects are small but not negligible in II–IV compounds.View full abstractDownload PDF (724K) -
Yutaka Toyozawa1976 Volume 41 Issue 2 Pages 400-411
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTime dependent description of resonance Raman scattering is performed for a general system, by a density matrix reformulation of damping theory originally used for resonance fluorescence of atom. Radiative damping in the intermediate states can be described in terms of “damping operator” in realistic situations. In large ergodic systems, the scattering reduces to luminescence if the relaxation time within the excited states is much shorter than the radiative lifetime. In a typical case, time resolved emission spectra consist of various stages—(i) scattering complex where absorption and emission are inseparable, (ii) dynamical and then (iii) kinetic relaxations giving rise to the hot luminescence, which finally converges to (iv) the ordinary luminescence from relaxed excited states. Hot luminescence does not appear within a motionally narrowed line. The interpretation of spectra depends also on the method of observation.View full abstractDownload PDF (1492K) -
Masayuki Ido1976 Volume 41 Issue 2 Pages 412-418
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe Knight shift of superconducting Al fine particles is measured at temperatures between 0.5 and 4.2 K in magnetic fields of 3.7 and 6.5 kOe. The transition temperature is found to rise with decreasing particle size and is 1.40, 1.43 and 1.54 K for the sample with an average diameter of 170, 130 and 80 Å, respectively. The large fluctuation effects on the Knight shift are observed in such fine particles. The results exhibit good agreement with the fluctuation theory in which the pair breaking of the magnetic field is taken into account. In the sample with an average diameter of 80 Å, the deviation from the fluctuation theory is observed below Tc and is discussed in connection with the discrete nature of one-electron energy levels.View full abstractDownload PDF (896K) -
Naohiko Yamashita, Kiichi Amaya1976 Volume 41 Issue 2 Pages 419-426
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe magnetic cooling and phase transition are studied experimentally in the spin pair system with the singlet ground state, CeCl3.7H2O. The results of the successful adiabatic demagnetization of CeCl3.7H2O from the initial condition, Hi=48 kOe and Ti=1.2 K, are reported. The cooling curve is obtained with the minimum temperature of 68 mK around the energy level crossing field of 4.7 kOe. The susceptibility at the crossing field is represented by the Curie-Weiss law with the ferromagnetic Curie-Weiss temperature of 68 mK in sufficiently low temperature region. The bottom of the cooling curve becomes flat around the crossing field at the temperature below 72 mK. It is concluded that the spin ordering occurs around the crossing field at the temperatures lower than the critical temperature of 72 mK.View full abstractDownload PDF (840K) -
Hideo Hasegawa1976 Volume 41 Issue 2 Pages 427-433
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effect of antiferromagnetic spin fluctuations on the superconducting transition temperature is discussed for the weak-coupling BCS model. The paramagnon-mediated depairing interaction μs and the mass enhancement due to paramagnons λs near the antiferromagnetic instability (α=1) are given as a function of α by μs(α)=λs(α)=ξ−η(1−α)1⁄2 (α=Iχo(Q), I is the electron-electron interaction, χo(Q) the staggered susceptibility for I=0, ξ and η constants). It is shown that the paramagnon effect is considerable on the BCS transition temperature as it is on the linear specific heat coefficient in the normal state. Semi-quantitative analysis is made for CrMo alloys.View full abstractDownload PDF (792K) -
Akio Oota, Yoshika Masuda1976 Volume 41 Issue 2 Pages 434-441
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThermal conductivities of Nb with resistivity ratios 6300, 2500, 1090 and 195 are investigated in the light of the strong coupling theory. The zero temperature energy gap function Δ(ω, 0) and renormalization functions Zs(ω, 0) and Zn(ω, 0) for Nb are determined by Eliashberg equations. The impurity and phonon scattering functions, f≡Kesi⁄Keni and g≡Kesp⁄Kenp, are derived experimentally. The behaviors of f are explained well by the Bardeen-Rickayzen-Tewordt theory. The behaviors of g are described well by the Ambegaokar-Tewordt (AT) theory with the strong coupling effect rather than by the Kadanoff-Martin (KM) theory without it. The limiting values of the slope of g at t≡T⁄Tc=1 are found to be 1.4, 3.0 and 3.8 for the KM, experimental and AT results, respectively.View full abstractDownload PDF (1004K) -
Hidenori Kubo, Itsuro Yahara, Kazuyoshi Hirakawa1976 Volume 41 Issue 2 Pages 442-448
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSNMR of copper nuclei belonging to the Cu2+ ions in several magnetically ordered compounds have been investigated. The magnitudes of both hyperfine field and quadrupole splitting distribute in wide range and depend on the ligand ions. The calculated values based on ionic model are always large compared with the observed ones. Reasonable values are obtained when appropriate covalent effects are taken into account. The large quadrupole interaction arising from the non-cubic charge distribution of the ground state 3d electrons of the Cu ions is considerably cancelled out by the opposite contribution caused by the charges of the ligand ions.View full abstractDownload PDF (964K) -
Koichi Katsumata, Yuji Kikuchi1976 Volume 41 Issue 2 Pages 449-453
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic field dependences of the isothermal susceptibilities in a typical S=5⁄2 Heisenberg linear chain antiferromagnet, CsMnCl3·2H2O, were measured in fields between 20 kOe and 45 kOe and at temperatures between 10 K and 15 K. It was observed that there was a considerable dependence of the susceptibilities on the external field.
The field dependence is explained theoretically in the classical spin (S→∞) limit. The partition function in the presence of the external field is expanded in powers of (H⁄T). Consequently, the susceptibility is expressed in powers of (H⁄T) whose coefficients are given by the higher order spin correlation functions in zero field. A quantitative agreement between the theory and the experiment is attained with no adjustable parameter.View full abstractDownload PDF (552K) -
Takashi Hashimoto1976 Volume 41 Issue 2 Pages 454-458
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSOblique incidence anisotropy in nickel films was investigated. In addition to the anisotropy which arises from an anisotropic stress in the film plane, there exist two anisotropy fields Hk(1) and Hk(2) which lie in the direction nearly parallel to the vapor beam direction and in the direction perpendicular to the incidence plane, respectively. Both the anisotropy fields Hk(1) and Hk(2) result from the columnar grains. The elongated shape of the columnar grain contributes to Hk(1), while the structure such as the bundle of the columnar grains may contribute to Hk(2). Furthermore, the residual strain, which seems to be a microstrain associated with the columnar grain structure, contributes to Hk(1).View full abstractDownload PDF (632K) -
Yoji Nakamura, Ryoichi Tahara1976 Volume 41 Issue 2 Pages 459-461
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe Mössbuer effect of 57Fe in the ferromagnetic ordered f.c.c. Fe3Ge has been investigated. The observed spectra indicate the presence of two classes of iron atoms. The Mössbauer spectra in high magnetic fields clearly show that the easy direction of magnetization is ⟨100⟩ and that the classification of iron atoms arises from a combined effect of magnetic and electric quadrupole interactions. The anisotropy of the hyperfine fields acting on iron atoms of two classes has been observed.View full abstractDownload PDF (384K) -
Shinji Ogawa1976 Volume 41 Issue 2 Pages 462-469
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSSpecific heats of FeS2–CoS2–NiS2 Solid solutions and of Ni0.95Cu0.05S2 have been measured from 10 K to 350 K. Debye temperatures, coefficients of electronic contribution γ, magnetic ordering temperatures, and magnetic entropies have been determined. The magnetic entropy of ferromagnetic Fe1−xCoxS2 is proportional to cobalt concentration and is 40% of that expected for a localized spin 1/2 per Co atom, suggesting an itinerant character of eg electrons. The magnetic entropy of NiS2 is smaller than that of a localized spin 1 and is in good agreement with that expected for the magnetic moment observed by neutron diffraction. The magnetic entropy of antiferromagnetic Co1−xNixS2 Suggests that only Ni atoms have magnetic moment in Ni-rich phase. The density-of-states curve of eg band for NiS2 has been constructed from γ values assuming a rigid band. The band width of lower half of eg band is 0.6 eV. The Debye temperature decreases monotonously from 605 K of FeS2 to 455 K of NiS2.View full abstractDownload PDF (952K) -
Ryohei Nakata, Katsuyasu Kohno, Minoru Sumita, Eiichi Higuchi1976 Volume 41 Issue 2 Pages 470-474
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn heavily manganese doped CaF2, three kinds of Mn2+ centers and exchange coupled pairs other than the usual Mn2+ centers in cubic crystal fields were found at room temperature. The spin Hamiltonian parameters are (I) g=2.00, |D|=740(G), E=36(G), A=80(G), as=12(G) and ap=2∼3(G); (II) g=2.00, |D|=938(G), E=20(G), A=67(G), as=11.2(G) and ap=1∼2(G); (III) g=2.00, |D|=1250(G), E=0(G), A=64(G) and a[111]=15.1(G), respectively.View full abstractDownload PDF (596K) -
Kokichi Oshima, Kiichi Okuda, Muneyuki Date1976 Volume 41 Issue 2 Pages 475-480
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSAnomalous g-shifts in low dimensional antiferromagnets, copper benzoate Cu(C6H5COO)23H2O and copper tetra-amine sulfate Cu(NH3)4SO4H2O (CTS) were observed mainly below 1 K. These compounds show positive g-shifts as temperature decreases. The results in copper benzoate are qualitatively explained by the theory recently developed by Nagata who introduced the one-dimensional short range order effect between inequivalent spins. The shifts in CTS are discussed from the two-dimensional point of view.View full abstractDownload PDF (612K) -
Hiroshi Yoshie, Motomitsu Matsushima, Nobuo Miyagi, Takao Unate, Hiroy ...1976 Volume 41 Issue 2 Pages 481-483
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe hyperfine field at the Co59 nucleus in Gd1−xYxCo5 has been observed as a function of yttrium concentration. The resonance signals of Co59 at sites I and II were observed in these compounds. In GdCo5, the field strengths at sites I and II were 180 and 167.5 kOe, respectively. The contribution of 4f electrons in gadolinium sublattice to the hyperfine field is at most 9 kOe. These results can be interpreted in terms of the contribution to the hyperfine field arising from the conduction electron polarizations.View full abstractDownload PDF (300K) -
Toshihiro Idogaki, Izuru Kimura1976 Volume 41 Issue 2 Pages 484-489
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe zero-point spin deviations (ΔR, ΔS) and the critical temperature (TN) of a model antiferrimagnet of vivianite-type spin structure are calculated by the Green function method with the decoupling scheme of Tyablikov. The dependences of the value of ΔR and ΔS on the spin values (R and S) are explained by the variation of ferromagnetic effective field which restrains the spin fluctuation caused by antiferromagnetic couplings. The dependence of TN on R and S is not so simple as in the case of antiferromagnets.View full abstractDownload PDF (656K) -
Tomoyuki Takeuchi1976 Volume 41 Issue 2 Pages 490-495
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSCopper single crystals with the tensile axes on the [111]–[212] line at an interval of 2 degrees were deformed in the range between −195°C and 800°C. The load-elongation curves varied continuously with the deviation angle from the [111] axis at all temperatures. The maximum work-hardening rate decreased with the angle from the [111] axis in the range within 10 degrees below 600°C. The active slip systems were estimated from the changes in the cross-sectional shapes of the specimens after deformation. The orientation dependence of the work-hardening rate near the [111] axis was explained by the cooperation of the two types of deformation mechanisms, i.e. the [121]- and the [212]-types.View full abstractDownload PDF (676K) -
Hiroyoshi Suematsu, Sei-ichi Tanuma1976 Volume 41 Issue 2 Pages 496-501
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Alfvén wave transmission in a thin slab of antimony has been observed at 22–26 GHz and 1.27 K by using high magnetic fields up to 15 Tesla and a carbon film bolometer having a quick response. The experiments were carried out in the Faraday configuration with the magnetic field applied along the principal axis of the crystal (the binary, bisectrix and trigonal axes). The measured mass densities are in agreement with the theoretical values calculated from the previously reported band parameters. The mean collision time of electrons and holes is obtained as 0.8–2.0×10−10 sec.View full abstractDownload PDF (848K) -
Tatsuro Miyasato, Fumio Akao1976 Volume 41 Issue 2 Pages 502-506
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe temperature and magnetic-field dependence of hypersonic attenuation in Sb-doped Ge is measured at liquid He temperatures. It is found that (1) the temperature dependence of attenuation in a sample with 1×1016 Sb atoms/cm3 is quantitatively explained by the simple relaxation formula; (2) the attenuation is anomalously large in a sample with 1×1015/cm3 Sb atoms; (3) the attenuation shows maxima as a function of magnetic field and this behavior cannot be explained by existing theories even when the Zeeman effect and internal stresses are taken into account.View full abstractDownload PDF (576K) -
Kiichiro Kagawa1976 Volume 41 Issue 2 Pages 507-512
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSTransient behavior of color centers under the N2 laser light (3371 Å) irradiation has been studied on nominally pure and Na+ doped KBr in the temperature range from LNT to 220 K using the oscilloscopic or the flash spectrographic method. The results are described with emphasis on the aspects different from those by the electron beam irradiation. 1) As the complement of F centers, V1 centers are predominantly formed instead of H centers. 2) F centers are relatively stable, having a decay time longer than the order of millisecond. 3) Efficiency of the F center formation is almost independent of temperature in the range examined. These experimental results suggest that the length of the replacement sequence of Br0 atom in the case of the N2 laser light irradiation is considerably long as compared with the case of electron beam irradiation.View full abstractDownload PDF (932K) -
Hidetoshi Fukuyama1976 Volume 41 Issue 2 Pages 513-520
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe equation is derived which describes the dynamics of the phase of the charge density wave in the Peierls-Fröhlich state in the presence of the impurity scattering. By use of the correlation function of the phase, the frequency dependence of the electrical conductivity, σ(ω), is calculated at T=0 K for the case of weak pinning forces. It is found that σ(ω) has a pronounced peak at a finite ω and that the theoretical results. If ω is replaced by (T−Tp) where Tp is the transition temperature the results are reminiscent of the conductivity in the region of fluctuations.View full abstractDownload PDF (892K) -
Motohiro Iwami, Kazuyasu Fujishima, Kazuo Kawabe1976 Volume 41 Issue 2 Pages 521-525
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSMagnetoresistance effect in p-Zn3As2 Single crystals with carrier concentration of ∼7×1015∼1018/cm3 was measured at low temperatures. The undoped crystals usually had ∼1017/cm3 carriers and showed negative magnetoresistance which could be explained by the model of metallic impurity conduction. Specimens containing less carriers (∼7×1015/cm3) showed positive magnetoresistance which was characterized by the intermediate impurity conduction. Specimens with p∼3×1016/cm3 showed magnetoresistance which could be explained by the additive contribution of the negative and positive effect. A possible model is proposed to explain these effects consistently.View full abstractDownload PDF (528K) -
Hitoshi Sumi1976 Volume 41 Issue 2 Pages 526-535
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe intensity ratio of the LO-phonon sideband to the zero-phonon line and the width of the zero-phonon line in the free-exciton luminescence spectrum can never be understood, especially at low temperatures, by the usual theory with the assumption of the thermal equilibrium for excitons. The theory assuming exciton thermal-equilibrium gives too small values for these quantities compared with the observed ones. These large discrepancies are removed by considering the exciton luminescence from the polariton viewpoint. In this viewpoint, polaritons accumulate around the bottleneck in polariton decay lower a little than the lowest exciton energy E0. Polaritons at the bottleneck determine the zero-phonon line, while polaritons maintaining approximately the thermal-equilibrium distribution in the energy region above E0 determine the LO-phonon sideband. The temperature and crystal-thickness dependences of the luminescence spectrum and the quenching of the luminescence by impurities are also discussed in terms of the polariton bottleneck.View full abstractDownload PDF (1384K) -
Nobuhiko Yamashita, Sumitada Asano1976 Volume 41 Issue 2 Pages 536-541
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSEmission, excitation and reflection spectra at various temperatures are studied. Under the C-band excitation, a simple emission band independent of the activator concentrations is observed for all the Ca(S:Se):Sn2+ phosphors. As the fraction of CaSe is increased, the band-peak (545 mμ for CaS:Sn2+ at 77 K) shifts constantly towards shorter wavelengths and finally reaches 518 mμ in CaSe:Sn2+ at 77K. In the excitation spectra, the curves characteristic of the Tl+-type ion center in the Oh crystal field can be obtained for all the Ca(S:Se):Sn2+ phosphors. The peaks of the C, B and A excitation bands are found at 311, 332 and 364 mμ for CaS:Sn2+, and at 327, 344 and 373 mμ for CaSe:Sn2+ at 77 K. For all the Ca(S:Se):Sn2+ phosphors, two additional excitation bands (409 and 448 mμ for CaSe:Sn at 77 K) are observed in the longer wavelength region of the A band at low temperatures.View full abstractDownload PDF (616K) -
Kenji Uchino, Shoichiro Nomura1976 Volume 41 Issue 2 Pages 542-547
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIt was found that complete solid solutions are formed in the systems of Pb(Fe2⁄3W1⁄3)O3–Pb(Mg1⁄3Ta2⁄3)O3 and Pb(MgW)1⁄2O3–Pb(FeTa)1⁄2O3. Pb(Fe2⁄3W1⁄3)O3 and Pb(Mg1⁄3Ta2⁄3)O3 are disordered perovskite type ferroelectrics, nevertheless the ordered arrangement of ions in the octahedral positions is formed to some degree in a certain region of intermediate composition. In the case of Pb(MgW)1⁄2O3–Pb(FeTa)1⁄2O3, the state changes from antiferro- to ferro-electric at about 70 mole percent of Pb(FeTa)1⁄2O3. The X-ray intensity of superlattice reflections was analyzed based on two different models. To confirm the ferro- or antiferro-electric behavior, the permittivity was measured in Pb(MgW)1⁄2O3–Pb(FeTa)1⁄2O3 system under applying d.c. bias field, and forced transition from antiferro to ferro-electric state was observed to occur in the biasing cycle.View full abstractDownload PDF (584K) -
Vladimír Dvo\v{r}ák, Yoshihiro Ishibashi1976 Volume 41 Issue 2 Pages 548-557
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDielectric properties of two nonequivalent sublattice polarizations are studied. Assuming a strong coupling favoring an antiparallel alignment of polarizations, the model reveals some new features of a ferroelectric transition with no multiple change of the unit cell volume. The Curie-Weiss constant is unusually small and this fact directly accounts for a possible sign change of the spontaneous polarization by only a slight variation of model parameters with temperature. The model also can describe a para-ferroelectric phase transition followed by an isomorphous phase transition between two ferroelectric phase with no change of symmetry. Temperature dependence of susceptibility is derived with the emphasis on the critical region in which the applied pressure or electric field smears out the difference between two isomorphous phases. The model can explain some properties of ammonium sulfate, dicalcium strontium and lead propionate.View full abstractDownload PDF (1192K) -
Ichiro Hatta, Akira Ikushima1976 Volume 41 Issue 2 Pages 558-564
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSHeat capacity of BaTiO3 has been measured in the vicinity of the ferroelectric-to-paraelectric transition temperature by using both the crystal grown by the top-seeded solution technique and that grown by the flux method. It is found that the temperature dependence of the heat capacity over a rather wide temperature range is well expressed by the free-energy function obtained by Drougard and Huibregtse. Furthermore, under the stress-clamped condition it is estimated from the above free-energy function that the jump of the molar heat capacity at the second order transition temperature is 0.19R. From this magnitude of the jump it may be concluded that a Ti ion, which is responsible for ferroelectricity in BaTiO3, lies in a single-minimum potential in the absence of an interaction with the other Ti ions.View full abstractDownload PDF (736K) -
Kazuo Gesi1976 Volume 41 Issue 2 Pages 565-569
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSFerroelectric phase transitions in the solid solution of triglycine selenate (NH2CH2COOH)3·H2SeO4 (TGSe) and deuterated triglycine selenate (ND2CH2COOD)3·D2SeO4 (DTGSe) were studied by means of dielectric-constant measurements. The Curie point monotonically increases with increasing deuterium content from 22.3°C for TGSe to 35°C for DTGSe. The deuterium-substitution induces a discontinuous change in dielectric constant at the transition accompanied with a thermal hysteresis of the Curie point. The first order nature of the transition becomes more and more conspicuous as the deuterium-content increases. The critical deuterium content at which the order of the transition changes from second to first seems to be very low.View full abstractDownload PDF (504K) -
Hiroshi Kaino1976 Volume 41 Issue 2 Pages 570-573
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSNon-ohmic behaviour of transient photocurrents in the pyrene-TCNE charge-transfer complexes is re-analysed by introducing the effect of the initial recombination into the surface-layer model. The anisotropy of drift mobility of carriers is comfirmed by using this analysis. The mobility in the direction of stacking of the donor and the acceptor molecules is several times larger than those in other directions.View full abstractDownload PDF (412K) -
Katsukuni Yoshida1976 Volume 41 Issue 2 Pages 574-581
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSAn anomalous longitudinal magnetoresistance which decreases with increasing magnetic field in an appropriate specimen geometry has been investigated for semimetals. An intuitive explanation of this phenomenon is given in terms of geometry of inhomogeneous currents under the influence of a magnetic field. Experimental results obtained for bismuth specimens at 77 K are also discussed.View full abstractDownload PDF (996K) -
Kazuo Ohtaka1976 Volume 41 Issue 2 Pages 582-589
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA new method is proposed for the calculation of the Green function for semi-infinite systems of coupled harmonic oscillators. For a model of the one-dimensional chain the expression of the Green function is derived, which is exact for arbitrarily long-range interactions between oscillators. It demonstrates clearly the absence of surface modes irrespective of the nature of the coupling. The Green function, used as the dielectric susceptibility of the model system, is shown to reproduce the additional boundary conditions (ABC) of Mahan and Obermair. The ABC for the q2-spatial dispersion are also discussed and the importance of the exact Green function is emphasized.View full abstractDownload PDF (952K) -
Toshihiko Ohno, Takayoshi Okuda1976 Volume 41 Issue 2 Pages 590-595
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe probability of two-photon excitation of an atom by the intense laser light is calculated formally and the probability per unit time of the three-photon ionization of an atom by the laser light with finite spectral line width is obtained for the case where a two-photon resonance occurs in an intermediate atomic level and the line shape of the laser light is Lorentzian. It is shown that the probability of three-photon ionization is proportional to the square of photon flux in the case of low photon flux and large spectral line width.View full abstractDownload PDF (716K) -
Kenji Natori1976 Volume 41 Issue 2 Pages 596-600
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCondon’s formalism of the optical activity suggests the presence of a sort of surface current at the boundary of the optically active medium. In this paper is discussed the origin of this surface current in terms of the general conductivity tensor. The expression of the surface current for the arbitrary medium consists of two parts; one is expressed with the bulk conductivity tensor and corresponds to the magnetization current in Condon’s formalism, while the other is related to the surface charge and reflects the surface property. The reflectivity calculated for a lossless isotropic medium shows that the normally incident linearly polarized light does not undergo optical rotation by reflection as is pointed out by some authors.View full abstractDownload PDF (608K) -
Yutaka Kano1976 Volume 41 Issue 2 Pages 601-606
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe normalized electric correlation tensor of second order is obtained for a superposition of blackbody radiation and a coherent beam of single mode. Several formulae for expressing the components of the spatial coherence tensor are obtained. The formulae of approximation valid for a small spatial separation, which are convenient for numerical calculations, are also derived. The behaviors of the spatial coherence functions are investigated numerically.View full abstractDownload PDF (540K) -
Yuhei Natsume1976 Volume 41 Issue 2 Pages 607-614
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA dynamical aspect of vibration-induced transition to a forbidden state is investigated theoretically in a vibronic treatment when the forbidden state lies closely to an allowed state and these two states are mixed into each other by a nuclear vibrational mode called “trigger phonon”. In the case of large mixing, the optical spectrum corresponding to the forbidden transition consists of vibronic lines associated with emission of odd numbers of trigger phonons for a one-dimensional mode while of both odd and even numbers of trigger phonons for a two-dimensional mode. These vibronic lines have anomalously strong intensity such as 10−1∼10−2 times that of the allowed transition. These features are in contrast to the results for the ordinary vibration-induced transitions which correspond to the case of small mixing.View full abstractDownload PDF (1096K) -
Yuhei Natsume1976 Volume 41 Issue 2 Pages 615-618
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe observed features of 2030 Å absorption band (1A1g→1B1u) of a benzene molecule are analyzed on the basis of the dynamical theory of vibration-induced transition developed in the preceding paper (I. Theory). The anomalously strong intensity of 1B1u band in observed spectrum reported by Hammond et al. {Discussions Faraday Soc. 9 (1950) 50} is ascribed to the large admixture of 1E1u state in 1B1u state through the nuclear vibration of e2g mode. Furthermore it is clarified that the observed fine structure in 1B1u band obtained by Brillante et al. {Molecular Phys. 25 (1973) 1263} is due to the vibronic structure corresponding to the emission of multi-phonons of e2g mode. The agreement between observed spectra and the calculated spectrum is satisfactory.View full abstractDownload PDF (444K) -
Yukikazu Itikawa1976 Volume 41 Issue 2 Pages 619-624
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe close-coupling calculation is made to obtain rotational excitation cross sections in e-CsF collisions. The result is compared with the Glauber and the adiabatic calculations and the validity of the latter two approximate methods is quantitatively tested. The Glauber theory is found to be quite good for small-angle scattering. The accurate adiabatic treatment is less satisfactory, though being much better than the Born calculation. Effects of the interactions other than the dipole one are investigated. Scattering for large angles (\gtrsim60°) and, hence, momentum-transfer cross sections are rather strongly affected by the shorter-ranged interactions. Finally, the cross section calculated for the rotational transition 1→2 is compared with the result of the recent measurement.View full abstractDownload PDF (604K) -
Nobuaki Noda1976 Volume 41 Issue 2 Pages 625-632
Published: August 15, 1976
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe cross sections for electron stripping of fast helium atom in helium gas and in nitrogen gas have been measured by the initial-growth method. The observed values are considerably smaller than those obtained by Hayden and Utterback using the condenser method. The cross sections for hydrogen atom in hydrogen gas and in nitrogen gas have also been measured. Below 0.5 keV, the present results for the stripping cross sections differ from those obtained by other authors. This is attributed to the improper assumption adopted by these authors that the secondary electron emission coefficients for neutrals are equal to those for ions. These coefficients for neutral particles incident upon a copper surface have been experimentally determined in this work. The effect of re-neutralization and of scattering upon the apparent stripping efficiencies are discussed on the basis of the obtained cross sections for charge transfer and for elastic scattering.View full abstractDownload PDF (956K) -
Jyoji Murakami1976 Volume 41 Issue 2 Pages 633-639
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSUsing the theories of the stiff chain polymer which have been worked out by Freed and Tagami, the configurational properties of an isolated stiff chain polymer near the adsorbing planar interface are investigated. Both theories give almost the same results, and the desorption-adsorption transition become more acute as the stiffness increases, as previously shown by Hoeve, DiMarzio and Peyser. However, the present theory is developped in terms of the bending force constant instead of a prefactor used by Hoeve, DiMarzio and Peyser.View full abstractDownload PDF (840K) -
Toshio Ohnuma, Shoji Miyake, Tsuguhiro Watanabe, Teruyuki Sato, Tetsuo ...1976 Volume 41 Issue 2 Pages 640-647
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSBy investigating the dispersion relation of electrostatic ion waves in a magnetic field, a linear coupling is found between electrostatic ion cyclotron waves and ion acoustic waves near the second harmonic ion cyclotron frequency. The coupling between the two modes are also detected experimentally in an argon plasma, which is nearly in accordance with the theoretical results.View full abstractDownload PDF (892K) -
Ryuiti Ikee1976 Volume 41 Issue 2 Pages 648-653
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSpectral line intensities emitted by a brush cathode discharge in a magnetic field have been measured and the population densities for levels n of 4 to 7 have been derived from them. The population densities obtained experimentally have been compared with theoretical values calculated on the basis of a collisional-radiative model in which the process He+e→He+(n)+e+e has been taken into account. The cross-sections of the process for levels n of 4 to 6 have been calculated by extending the calculations of the 4P and 4D states by Dalgarno and McDowell and the 4S and 4F states by Lee and Lin. The calculated population densities for levels n of 4 to 6 are fairly in good agreement with the experiments for a plasma with the following parameters: Ne=1.8×1013 cm−3, Te=0.17 eV, p=0.9 Torr, discharge voltage =1150 V, discharge current=500 mA, and magnetic flux density=1.3 kG.View full abstractDownload PDF (676K) -
Heiji Sanuki, Yoshi H. Ichikawa1976 Volume 41 Issue 2 Pages 654-657
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe modified Korteweg-de Vries equation describing the nonlinear self-distortion of the propagation cones of lower-hybrid waves is derived. The multiple soliton solutions (for finite density region) and the shock-like solutions (for low density region) are also obtained.View full abstractDownload PDF (352K) -
Tomokazu Kato, Takashi Okazaki1976 Volume 41 Issue 2 Pages 658-666
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe damping rate of a large-amplitude electron wave in one dimensional plasma is derived by using the first order perturbation. As the unperturbed solution, the stationary state of Bernstein, Greene and Kruskal’s theory is employed. It is shown that the damping rate is proportional to the depth of trapping trough and also there exists an upper limit of the depth for stable sideband oscillations.View full abstractDownload PDF (980K) -
Koji Mio, Tatsuki Ogino, Kazuo Minami, Susumu Takeda1976 Volume 41 Issue 2 Pages 667-673
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe modulational instability and envelope-solitons are analyzed for the Alfvén waves propagating along the static magnetic field in cold collisionless plasmas, using the modified nonlinear Schrödinger equation previously derived by the authors. The modulational instability occurs in the left-hand circularly polarized Alfvén wave (left Alfvén wave) for a small amplitude but does not for an amplitude larger than the critical value. On the other hand, the instability never occurs in the right-hand circularly polarized Alfvén wave (right Alfvén wave). When the modulational instability does not occur, the rarefactive and compressive envelope-solitons exist in the left Alfvén wave and the two types of the rarefactive envelope-solitons exist in the right Alfvén wave.View full abstractDownload PDF (776K) -
Mitsugu Matsushita1976 Volume 41 Issue 2 Pages 674-680
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Glansdorff-Prigogine method in thermodynamics of nonequilibrium open systems is reformulated when the systems have a freedom of convective motion, and the z-function used by them is found to be the entropy of the system. The method is then extended so as to include effects of applied electric and magnetic fields. The result is applied to investigate the onset of the Felici instability in electrohydrodynamic systems, which is shown to have a strong resemblance with the well-known Bénard instability in thermohydrodynamic systems.View full abstractDownload PDF (832K) -
Kazuo Matsuuchi1976 Volume 41 Issue 2 Pages 681-687
Published: August 15, 1976
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThis paper deals with the effect of viscosity on long gravity waves of small but finite amplitude. In a previous paper, Kakutani and the present author derived a simple equation concerned with this problem. Initial value problems for this equation are solved numerically. The results are compared with the experiments made by Zabusky and Galvin. By expanding the free surface elevation into Fourier series, each component is investigated separately. The temporal variations of the Fourier components together with those of the wave energy are computed.View full abstractDownload PDF (828K)