All issues
Volume 23 (1967)
- Issue 6 Pages 1191-
- Issue 5 Pages 911-
- Issue 4 Pages 673-
- Issue 3 Pages 481-
- Issue 2 Pages 145-
- 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 23, Issue 2
Displaying 1-50 of 72 articles from this issue
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Yasuyuki Gono, Masayasu Ishihara, Mitsuo Sakai1967 Volume 23 Issue 2 Pages 145-146
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSGamma rays in the decay of Ce134→La134→Ba134 were investigated with a lithium drifted germanium detector. Gamma rays of energies 0.605±0.001 and 0.563±0.001 MeV were assigned to the decay of La134. The log ft values were deduced from the gamma ray intensities. That for the first beta component from the 1+ parent nuclide La134 to the ground state of Ba134 is 4.81±0.02 and those for the second component to the first 2+ state and the third component to the second 2+ state range from 5.60±0.08 to 5.65±0.11 and from 6.24±0.17 to 6.54±0.99 respectively, depending on the assumed decay schemes. These values indicate that the successive hindrance phenomenon of allowed beta transitions of G–T type in vibrational region exists in the decay treated in the present experiment.View full abstractDownload PDF (220K) -
Isao Kumabe, Hiroshi Ogata, Tong-Hyuk Kim, Makoto Inoue, Yasuhiko Okum ...1967 Volume 23 Issue 2 Pages 147-153
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThin targets of 58Ni, Cu, Ag, Ta and Au were bombarded with 28.4-MeV alpha particles and the energy spectra of emitted alpha particles were measured at several angles.
The experimental values of the peak energies in the energy spectra at 150° arising from the compound-nucleus process were found to be in good agreement with the values of the Coulomb barrier height for an optical model potential.
Prominent features of the energy spectra for Ag are as follows. The differential cross sections at a forward angle (30°) increase with alpha-particle energy, while those at backward angles (more than 90°) decrease with alpha-particle energy. At an intermediate angle (60°) between them, the energy spectrum is nearly flat. General features of the energy spectra for Ta and Au resemble those for Ag except for the low energy parts where the cross sections are decreased by the higher Coulomb barrier.
These features may be explained by a mechanism which takes account of the collective excitation of the residual nucleus.View full abstractDownload PDF (864K) -
Iwao Takemoto, Takeki Iwashita, Seizaburo Kageyama1967 Volume 23 Issue 2 Pages 153-157
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe energy levels of Te127 populated by the decay of Sb127 has been investigated. The gamma rays with energies 61.1, 74.6, 154.4, 252.5, 280.5, 290.3, 309.0, 391.5, 405.0, 411.6, 423.7, 440.7, 444.9, 451, 456, 473.0, 501.5, 543.0, 603.6, 624.0, 638.5, 653.5, 666.9, 675.6, 685.2, 698.5, 723.4, 745.4, 783.8, 789.5, 817.3, 820.1, 923.5, 1141.2, 1155.2 and 1291.5 keV were observed by a Ge(Li) detector. The relative intensities of these gamma rays were estimated. The end-point energy of the beta component with the highest energy was measured to be 1.50±0.02 MeV. On the basis of the experimental results a level scheme of Te127 is proposed.View full abstractDownload PDF (428K) -
Nobuhiko Saitô, Hajime Hirooka1967 Volume 23 Issue 2 Pages 157-166
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA study is made of the vibration in one-dimensional system of identical particles which are held together by harmonic forces. The long-time averages of mechanical quantities, especially, of the kinetic energy and the potential energy of the system are discussed in the case when a constant external force is applied to one of the particles. As far as the velocity of a particle is concerned, the Maxwellian distribution is established. However some, correlations between the velocities of neighboring particles remain unvanished. This means that the system does not reach to the true thermal equilibrium.View full abstractDownload PDF (732K) -
Nobuhiko Saitô, Hajime Hirooka1967 Volume 23 Issue 2 Pages 167-171
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSComputer studies are made of the long time behavior of the anharmonic lattice vibration, since the harmonic lattice is known not to have ergodicity. The system consists of N+2 particles connected by springs which have linear as well as quadratic force terms. The equation of motion for this system is solved by means of a computer for the cases N=4, and N=8. Long time averages of the kinetic energy for each particle and the correlation between velocities of neighboring particles are examined with the expectation in mind that the establishment of equilibrium may be obtained in contrast to the case of the harmonic lattice. However, similar results as in the case of harmonic lattice are yielded in all the calculations, namely, the system of particles shows very little tendency toward the vanishing of the correlation between the velocities of the nearest neighbor particles.View full abstractDownload PDF (436K) -
Shigehiro Komura, Yoshikazu Hamaguchi, Nobuhiko Kunitomi1967 Volume 23 Issue 2 Pages 171-179
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSElectrical resistivity and powder neutron diffraction patterns for Cr–V–Mn ternary dilute alloys have been measured at various temperatures. From the measurement an estimation is made on the Néel temperature, spin arrangement, average magnetic moment and wave vector of spin density wave. The ternary data are compared with those already obtained on the Cr–V or Cr–Mn binary dilute alloys. This comparison is made on the same scale of effective concentration, i.e. the manganese concentration subtracted by the vanadium concentration in units of atomic percent. The results have shown that there is a good agreement between the data on the ternary and binary alloys. This fact supports the validity of rigid band approximation. The wave vector was evaluated using the three models which were proposed for explanation of the properties of chromium metal. The results were compared with the experimental results.View full abstractDownload PDF (1028K) -
Seiya Ogawa, Yasuaki Nakagawa1967 Volume 23 Issue 2 Pages 179-184
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSCation diffusion in Mn–Zn ferrites having excess iron was investigated by means of the isotope tracer method using single and polycrystalline samples. In polycrystalline samples “volume diffusion” and “grain boundary diffusion” were observed and separated from each other. The results are: (1) The volume diffusion coefficient of 59Fe varied with the oxygen content, i.e., the density of cation vacancies in the sample. Activation energy of the diffusion was 1.50±0.05 eV, being independent of the vacancy density. This value means the migration energy of vacancies. (2) The volume diffusion coefficients obtained were same for 54Mn, 59Fe, 60Co and 65Zn, but slightly different for 45Ca. (3) The grain boundary diffusion coefficient was as sensitive as the volume diffusion coefficient to sintering atmospheres.View full abstractDownload PDF (744K) -
Shuichi Iida, Tetsutaro Iizuka1967 Volume 23 Issue 2 Pages 185-188
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDisaccommodation spectrum of magnetite found by Braginski were investigated experimentally and theoretically. Peak II is caused by the presense of extremely small concentration of cobalt impurity and it disappears for the high purity magnetite. Peak III is caused by the preferential occupation of cation vacancies and the accurate expression of the relaxation time is 1⁄τ=8I0=6.0×1013exp(−Q⁄kT), where Q=0.94 eV and I0 is the jumping frequency of an iron ion into the nearest neighbor cation vacancy. A suggestion is made for the low temperature line width anomaly of Li0.5Fe2.5O4 that it is due to ppm cobalt impurity.View full abstractDownload PDF (444K) -
Sonoko Tsukahara1967 Volume 23 Issue 2 Pages 189-204
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to find the most suitable condition for electron microscopic observation of the magnetization ripples, the images obtained by three methods, that is, the defocus-, the shadow image- and the slit- method, were compared for magnetic and nonmagnetic films quantitatively. The dependence of the ripples on applied magnetic field, on temperature and on a number of parameters of films is discussed in detail. Observation was made in condensed films of Ni, Fe, Co, Ni–Fe alloys, and Ni–Co alloys and also in chemically and electrolytically polished single crystal films of Ni–Fe alloys, Ni and Fe. As the origins of the ripples following conclusions are arrived: (1) The microscopic anisotropies such as the crystalline anisotropy, the stress induced anisotropy, the shape anisotropy and the stray field anisotropy contribute the ripples with equal weights at room temperature. (2) The macroscopic anisotropy due to macroscopic anisotropy due to macroscopic origin only has an effect to decrease the ripples. (3) The shape anisotropy and the stray field anisotropy are more effective at higher temperatures. The ripples near the temperature of domain disappearance. Tdc, are due to thermal fluctuation of magnetization, which may appear also in bulk materials.View full abstractDownload PDF (7944K) -
Yoshikazu Ishikawa, Yasuo Endoh1967 Volume 23 Issue 2 Pages 205-213
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe antiferromagnetism of disordered γ-FeMn alloys has been studied by neutron diffraction and Mössbauer effect. The average magnetic moment per atom at 0°K decreases with decreasing Fe concentration from 1.94μB for 69.1 at% Fe to 1.08μB for 47 at% Fe. The hyperfine field at 0°K acting on the Fe nucleus, however, remains almost constant at about 40 kOe±3 kOe for this concentration range. The temperature dependence of the sublattice moment for 69.1 at% Fe fits with the Brillouin function BJ(x) with J=1. The decrease of the moment near the Néel temperature becomes steeper when the concentration of Fe is lower. In contrast with it, the temperature dependence of the hyperfine field is independent of concentration, and is markedly different from the temperature dependence of the sublattice moment for any concentration. The results indicate that the magnetic moments on Fe and Mn atoms behave with temperature in fairly different ways in this alloy system. The magnetic form factor of γ-FeMn alloys was also determined.View full abstractDownload PDF (1096K) -
Takasu Hashimoto, Yoshikazu Ishikawa1967 Volume 23 Issue 2 Pages 213-223
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe specific heat and the thermoelectric power of γ-FeMn alloys were measured for three different compositions. The peak of the specific heat at the Néel temperature is broad for Fe70Mn30 but it becomes sharp when the concentration of Fe decreases. This tendency is interpreted in terms of the temperature variation of the sublattice magnetization of the alloys.
The magnetic entropies obtained are 1.4, 0.83 and 0.57 cal/mol. deg. for Fe70Mn30, Fe60Mn40 and Fe50Mn50 respectively. These values are nearly a half of those estimated for the localized spin system. The thermoelectric power is also strongly composition dependent. The temperature dependence of the thermoelectric power suggests that two types of carriers exists in the alloys. Only a small anomaly was observed at the Néel temperature. The results suggest that the antiferromagnetism of γ-FeMn alloys is distinctly different from that of Cr.View full abstractDownload PDF (1244K) -
Yoji Nakamura, Nahonori Miyata1967 Volume 23 Issue 2 Pages 223-229
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTernary alloys of Fe65(Ni1−xMnx)35 have an f.c.c. structure over a whole range of composition and show a transition from ferromagnetic to antiferromagnetic at around the composition of x=0.3. In this transition region it is quite interesting to study their magnetic properties because of the possible coexistence of ferromagnetic and antiferromagnetic regions. This paper mainly deals with the exchange anisotropy of these alloys at low temperatures down to 1.4°K obtained by measurements of rotational hysteresis loss and unidirectional anisotropy. The results show an evidence for the coexistence of ferro- and antiferromagnetic regions at low temperatures. A temperature TK, where the rotational loss disappears due to the small anisotropy constant of antiferromagnetic regions, is considered to indicate a lower limit of the Néel temperature, TN of the regions. Values of TK for x≤0.4 connect smoothly onto values of TN for x≥0.4.View full abstractDownload PDF (804K) -
H. Forstat, N. D. Love, J. N. McElearney1967 Volume 23 Issue 2 Pages 229-232
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSSpecific heat measurements of single crystals of NiI2·[(NH2)2CS]6 in the temperature range 1.3°–6.0°K indicated two magnetic phase transitions at 1.64°K and 1.77°K. These transitions appear to be of the paramagnetic-antiferromagnetic type. The total entropy associated with these transitions is 2.179 cal/mole·deg which is in good agreement with the value of 2.182 cal/mole·deg from R ln (2S+1) where S=1 for the spin of the Ni++ ion. Approximately 75% of this total entropy change is recovered above 1.77°K. The sublattice magnetization, calculated from the specific heat data, is compared with the molecular field theory and several other statistical models.View full abstractDownload PDF (348K) -
Noboru Matsudaira1967 Volume 23 Issue 2 Pages 232-240
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA method to calculate the dynamical as well as the static properties of the Ising ferromagnet, developed in the previous paper for the two-dimensional square lattice, is extended to cubic lattices. The temperature dependence of the frequency-dependent magnetic susceptibility, approach to equilibrium of the magnetization of the system, the fluctuation-dissipation theorem, and some static properties are calculated. It is proved that all these properties are essentially the same for cubic lattices and for two-dimensional model. It is further demonstrated by explicit calculation that the non-linear effect is very important for the critical slowing-down near the Curie point, especially in the ferromagnetic region.View full abstractDownload PDF (960K) -
Mikio Yamanaka, Ryuzo Ueda1967 Volume 23 Issue 2 Pages 241-250
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTorque curves are observed for anomalous Ni thin films of various thickness to clarify the origin of perpendicular anisotropy in connection with the formation mechanism of evaporated thin films. The observed torque curves are compared with the curves calculated with the assumption of the stripe domain structure. A large perpendicular anisotropy is introduced when islands grains coalesce each other, whereas the contamination by air reduces the anisotropy. The Ni film deposited on grease has also a large perpendicular anisotropy. There are some essential discrepancies between observed torque curves and calculated ones, which mean that the experimental facts can not be explained simply by the perpendicular anisotropy resulted from both the magnetostrictive and magnetostatic anisotropies. A reasonable explanation can be given if the magnetization is assumed to be pinned down at a certain interval region by some effects like ferro-antiferro interaction. The preparation conditions of these films favour this assumption.View full abstractDownload PDF (1148K) -
Hideo Ohno, Takao Suzuki, Hideo Takaki1967 Volume 23 Issue 2 Pages 251-254
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn order to clarify the degree of localization of the impurity state, electrical resistivities of dilute chromium alloys with Mn, Fe and Co were measured from 1.2°K above to their transition temperatures. The resistivity due to the potential scattering by the impurity atom was separated empirically and it was found that the resistivity due to impurity scattering of Mn alloy is at most 0.8 μΩ cm per 1 at. % of Mn and is extremely small compared with those of Fe and Co. This supports the view that the impurity state of Mn in Cr is not localized, while those of Fe and Co are considerablly localized. No resistance minimum was observed in these alloys and even in very dilute alloys within the experimental errors.View full abstractDownload PDF (444K) -
Fujio Irie, Kaoru Yamafuji1967 Volume 23 Issue 2 Pages 255-268
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA phenomenological expression of the pinning force density is proposed, and the equation of force balance including this expression is shown to describe well the motion of magnetic fluxoids in non-ideal type-II superconductors in cooperation with the equation describing the continuity of magnetic flux flow. The parameters related to an individual pinning force and pin distribution are included in the present expression which contains those from the models of Bean-London, Silcox-Rollins and Yasukochi as its special cases.
The calculated magnetizations agree well with observed data by adjusting the parameters. The hysteresis losses in the course of magnetization are calculated and the field dependence of the a.c. losses are explained. The formulas of the a.c. dynamic losses are also shown. The field dependence of the critical current in the resistive state and the relaxation time of flux penetration are calculated and compared with observed data.View full abstractDownload PDF (1776K) -
Hiroshi Morisaki, Yoshio Inuishi1967 Volume 23 Issue 2 Pages 269-275
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSTwo types of microwave emission, namely noise type and resonance type emission, from InSb plasma subjected to crossed electric and magnetic fields were investigated experimentally. From the simultaneous measurements of Hall effect and microwave emission, the noise type emission was found to be observable above some thresholds of the applied magnetic field and the density of electron-hole plasma. The threshold condition was obtained as (ωceτe)2·Δn≥3×1014 cm−3, where ωce, τe and Δn are electron cyclotron frequency, relaxation time and electron-hole pair density, respectively. It was also found that the ‘Hall’ mobility showed anomalous decrease above the threshold. The power of the resonance type emission shows maxima at several values of the applied magnetic field lower than the threshold of the noise type emission. These characteristic magnetic fields were not influenced by current density except slight change in the low current density region.View full abstractDownload PDF (884K) -
P. Csavinszky1967 Volume 23 Issue 2 Pages 276-282
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA new theory of screening of donor ions in heavily-doped semiconductors is proposed which takes into account the specific nature of the impurity ions. The salient features of the resulting donor ion potentials are the following. The screening of the ions arising from the conduction electrons extends over a spherical shell whose inner radius is the Slater radius of a donor ion and whose outer radius is half of the distance between two donor ions. At the inner radius the donor ion potential assumes the potential of the free donor ion while at the outer radius the potential vanishes. Mobility considerations using the proposed potentials account for the experimental finding that at the same electron concentration and temperature the electron mobility in Sb-doped Ge is larger than that in As-doped Ge. Further considerations are compatible with the additional experimental finding that at the same electron concentration and temperature the electron mobility in P-doped Ge is smaller than that in Sb-doped Ge but larger than that in As-doped Ge.View full abstractDownload PDF (748K) -
Tetsuya Arizumi, Takeshi Aoki, Masayoshi Umeno1967 Volume 23 Issue 2 Pages 283-289
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSWhen a slab of n-InSb excited optically was subjected to an electric field between 80 V/cm and 210 V/cm at 77°K, the current saturation associated with a current spike or a damped current oscillation occurred. At the same time the moving high-field domain was detected, whose velocity increased from 2×105 cm/sec to 1.2×106 cm/sec with the increase of the electric field and of the optical excitation.
The measurement of the Hall effect showed that the velocity of the moving domain is much smaller than that of electrons in the corresponding electric field. The crystallographic orientation had no significant effect. The results are discussed in terms of various possible mechanisms, and it is concluded qualitatively that these phenomena are possibly due to the recombination nonlinearity.View full abstractDownload PDF (820K) -
Hisao Miyazawa, Hideaki Ikoma1967 Volume 23 Issue 2 Pages 290-305
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSContrary to earlier views, it was disclosed that (1) the donor band distinctively exists below the conduction band even in absence of magnetic field, and, at T≤4.2°K, most electrons are in the donor band in thermal equilibrium but are abruptly ionized to the conduction band by an electric field within 0.1 v/cm, while (2) the non-linear quantum-limit effect, predicted by Kazarinov and Skobov, explicity occurs at electric fields higher than ∼1 v/cm and is replaced by the classical-limit effect after showing a resistivity minimum at ∼40 v/cm. These new conclusions are based on extensive measurements of resistivity and Hall coefficient by null method for n-InSb with ND−NA∼1×1014 cm−3 as a function of electric field up to 200 v/cm with and without a transverse magnetic field below 12k-gauss between 1.8 and 77°K. Effects of magnetic field and temperature on the carrier concentration in the conduction band and the mobility in the donor band are also described.View full abstractDownload PDF (2172K) -
Koichi Kobayashi, Takao Kawai, Mihoko Kanada1967 Volume 23 Issue 2 Pages 305-311
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe drift mobility of photoelectrons in TlCl has been measured over the temperature range between 90°K and 330°K by a transit time technique in order to study the behavior of finite temperature polarons. The intrinsic mobilities are measured in the whole range of temperature only in zone-refined crystals. They are compared with the theories developed recently for the finite temperature polarons as well as those for the low temperature ones. The agreements are shown to be unsatisfactory. Decrease of the drift mobility at low temperatures as a result of multiple trapping effect due to the presence of shallow traps of 0.05 eV depth is observed in some crystals.View full abstractDownload PDF (932K) -
Yoshikazu Hayashi, Minoru Fukui, Hide Yoshioka1967 Volume 23 Issue 2 Pages 312-318
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe electron spin resonance produces marked changes of optical Faraday rotation of CaF2 crystals doped with Eu2+ ions. The positions of resonance lines determined by observing the Faraday rotation are in good agreements with the published data. This effect is especially useful for the study of saturation of spin systems by strong microwave field and for the study of forbidden transitions.View full abstractDownload PDF (720K) -
Kazuo Morigaki, Teruhiko Hoshina1967 Volume 23 Issue 2 Pages 318-324
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSElectron spin resonance of a Fe3+-associated center in cadmium selenide has been observed at liquid helium temperatures. The center responsible for the resonance has been identified as being a Fe3+ ion occupying a cadmium site that is associated with a negatively charged defect on one of the six cadmium sites nearest to the Fe3+ ion. The spin Hamiltonian for a Fe3+ center of orthorhombic symmetry having S=5⁄2 is (Remark: Graphics omitted.), where the y-axis is rotated 16.5° away from the c-axis toward the line connecting a Fe3+ ion with one of the six cadmium site nearest Fe3+ and the x-axis lies in the (11\bar20) plane containing the y-axis. The effective g-values for the transition within the lowest Kramers doublet are given by gx=0.91±0.02, gy=9.24±0.06, and gz=1.68±0.03. The intensity variation of the resonance signal with irradiation of light of various wavelengths has been measured and can be interpreted in terms of the process of hole transfer from cadmium vacancies or isolated Fe3+ ions and the process of recombination with the electrons excited from Fe2+ ions into the conduction band.View full abstractDownload PDF (948K) -
W. N. Lawless1967 Volume 23 Issue 2 Pages 325-331
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMinimum-energy calculations are reported for two types of antiferroelectric arrays in BaTiO3, alternating planes perpendicular to [100] (AP(100)) and alternating planes perpendicular to [110] (AP(110)). The non-linearity of the oxygen polarizability is taken into account. The energies of these arrays are compared to the energy of the ferroelectric array as a function of α0, the coefficient of the oxygen-polarizability tensor (α0 is taken as the cubic-phase, isotropic oxygen polarizability). It is found that for α0<1.1Å3, neither the polar nor anti-polar arrays are stable relative to the non-polar state; for 1.10<α0<1.32Å3, the AP(100) array is most stable; for 1.32<α0<2.31Å3, the ferroelectric array is most stable (in the actual BaTiO3 crystal, α0=2.16Å3); and for α0>2.31Å3, the AP(110) array is most stable.View full abstractDownload PDF (908K) -
Toshihiko Takama, Toshio Mitsui1967 Volume 23 Issue 2 Pages 331-334
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSPrecise measurements have been made on X-ray Bragg reflections by SbSI. Temperature dependence of the (00l) X-ray Bragg reflections suggests that the ferroelectric phase transition in SbSI is of the displacive type. Difference between the integrated intensity of (082) Bragg reflection measured in the ferroelectric phase and that of the extrapolated paraelectric phase is approximately proportional to the squared spontaneous polarization.View full abstractDownload PDF (444K) -
Kazuyuki Itoh, Toshio Mitsui1967 Volume 23 Issue 2 Pages 334-337
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSIt has been found that the dielectric constant of TGS along the b axis generally exhibits round peaks at low temperatures. The peaks appear around −90°C and −40°C for the signal field of 1 kc/s. The peak heights decrease and the peak positions shift to high temperature side with increasing frequency of the signal field. The peaks disappear by applying a bias field of about 7 kV/cm.View full abstractDownload PDF (384K) -
Atsushi Kikuchi, Yoshio Oka, Etsuro Sawaguchi1967 Volume 23 Issue 2 Pages 337-354
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA change of atomic arrangement of SbSI between the paraelectric phase and the ferroelectric phase is investigated. Analyses are made on Weissenberg photographs taken at 35°C (paraelectric phase) and at 5°C (ferroelectric phase). In the paraelectric phase (space group D2h16-Pnam, lattice constants, a=8.52Å b=10.13Å c=4.10Å), the atomic positions are: Sb(x=0.1189, y=0.1243, z=1⁄4), S(x=0.840, y=0.050, z=1⁄4), I(x=0.5080, y=0.8276, z=1⁄4); the thermal vibration of Sb ions along the c axis is relatively large with the mean square amplitude \barUz2=(0.16)2Å2. In the ferroelectric phase (C2v9-Pna21), the x and y parameters are substantially the same as those determined in the paraelectric phase. Major changes take place in the z parameters: Sb(z=1⁄4+0.048) and S(z=1⁄4+0.01) shift along the ferroelectric c axis with respect to iodine by 0.20Å and 0.05Å respectively. Evidences are shown that the phase transition is of displacive type.View full abstractDownload PDF (3880K) -
Hideo Okazaki1967 Volume 23 Issue 2 Pages 355-360
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe mobility μ and the diffusion coefficient D of silver ions in Ag2S, Ag2Se and alloys Ag2S1−xSex have been measured by the aid of tracer technique using Ag110m.
The ratio μ⁄D is found to deviate from the Einstein relation remarkably. Although such deviation is usually attributed to the existence of correlation between successive jumps of a diffusing ion, the present substances are so much disordered that the correlation effect theory cannot be applied. Recently Yokota has proposed a new model appropriate to our substances. The experimental results are compared with his theory with a minor modification. It is proved that the theory is applicable to our substances.View full abstractDownload PDF (708K) -
Toshiyuki Ninomiya, Shunya Ishioka1967 Volume 23 Issue 2 Pages 361-372
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe equation of motion of a dislocation is derived on the basis of the Peierls model. From the equation the mass of a kink is calculated and the interaction between kinks is obtained including the effect of retardation. The mass and the line tension of a vibrating dislocation of infinite length are found to depend on both the frequency and the wave length. It is shown that a resonance scattering takes place for a transverse phonon incident obliquely on a screw dislocation. For a pinned dislocation the use of the concepts of the line tension and the mass is not justified near the pinning points.View full abstractDownload PDF (1100K) -
Shoichi Annaka1967 Volume 23 Issue 2 Pages 372-377
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIntensity change of the fluorescent X-rays accompanying the Laue case reflection from perfect germanium crystals was observed together with intensity profiles of diffracted and transmitted beams, using a double-crystal spectrometer. Observation was made on the intensity variations of Kα and Kβ fluorescent X-rays with rotation of the crystals through the 220 reflection region and with increasing thickness of the crystals. The result showed a behaviour which can be explained in terms of the formation of two types of standing-wave fields of X-rays in the crystals and the Borrmann effect. The obtained results were compared with a theoretical calculation.View full abstractDownload PDF (712K) -
Teruyuki Sato, Kiyokata Matsuura, Akira Miyahara, Shigeo Nagao1967 Volume 23 Issue 2 Pages 378-398
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSResonance peaks observed near the ion cyclotron harmonics (n≤5) of H+, H2+ and H3+ are studied in a low density plasma column. According to the dependences on rf voltage applied across a plasma column and electron temperature of the resonance frequency, it is conjectured that the behaviour of these resonances is caused by the electrostatic ion cyclotron waves propagating almost perpendicular to the magnetic field. Ions collected by ion collectors and electrodes are accelerated perpendicularly up to 3 keV, while the electron temperature displays little increase. The observed plasma loading indicates that the efficiency of power transfer between the electrodes and the plasma is greater than 50 per cent.View full abstractDownload PDF (2712K) -
Yukitomo Komura, Etuko Kishida, Mineji Inoue1967 Volume 23 Issue 2 Pages 398-404
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA semi-binary Laves phase compound 92.5 mol% MgZn2-7.5 mol% MgAg2 was examined by the X-ray method. A structural principle of the Laves phases is at first discussed generally on the basis of layer stacking. Although there are six fundamental layers of A, A′, B, B′, C and C′ in the Laves phases, layer sequences can be deduced from the same principle derived by Patterson and Kasper (International Table for X-ray Crystallography, Vol. II) as in the case of the closest packing of spheres.
Using this principle the crystal structure of the compound is determined. It is hexagonal and belongs to the P63/mmc space group, with 20 formula units in the cell of the dimensions with a=5.22 and c=42.95Å. The structure is expressed by a 10-layer sequence such as ABC′ BCA′ C′ BC′ B′ among 16 possible sequences. Atomic parameters are given on the basis of the above sequence. Relation between structures previously found and a new one is also discussed.View full abstractDownload PDF (964K) -
Takeshi Shigenari1967 Volume 23 Issue 2 Pages 404-415
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe hyperfine structure and the Zeeman effect in the 110→111 transition of H2CO has been studied with a high resolution beam maser spectrometer. The frequency of the most intense F=2→F′=2 hyperfine component transition was measured to be 4829.649±0.0005 MHz. Theory of the magnetic hyperfine interaction in the presence of external static magnetic field was developed to analyze the experimental result.
The spin-rotation interaction constants of proton nuclei in H2CO were determined as Cxx=−5.0±1.5 KHz, Cyy=4.2±1.5 KHz and Czz=−5.3±0.2 KHz. The rotational g-factors of H2CO were also obtained as Gxx=−0.14±0.03, Gyy=−0.14±0.03, Gzz=−2.90±0.05 and |Gxx−Gyy|<0.036.View full abstractDownload PDF (1332K) -
Kiyoshi Murakawa, Manabu Yamamoto1967 Volume 23 Issue 2 Pages 416-418
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSGeneral formulas for deducing the quadratic Stark effect constant of Ar II are derived, assuming an LS-coupling. As an example numerical calculation for γ (λ 4348) is presented.View full abstractDownload PDF (224K) -
S. D. Dey, S. B. Karmohapatro1967 Volume 23 Issue 2 Pages 418-421
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe surface ionization of the rare earth elements Gd, Ho, Dy, Pr and Er has been studied for very low electric field (<3 KV/cm) at the surface and the ionization potentials (I.P.) of these elements have been measured. The values of ionization potentials are: Gd- 6.73±0.09 eV, Ho- 6.08±0.09 eV, Dy- 5.72±0.10 eV, Pr- 5.61±0.11 eV and Er- 6.36±0.10 eV. A reasonable agreement of these values with the spectroscopically determined ones suggest that the degree of ionization follows the general form of the Saha-Langmuir equation. The measurements, carried out with rare earth chloride molecular beams on the polycrystalline surface, indicate that (1) complete dissociation of the rare earth halides occur for surface temperatures at ∼2000°K, (2) above 2000°K the surface remains free of adsorbed chlorine and (3) the variations of the ratios of the statistical weight factors of the ions and atoms with temperature are small.View full abstractDownload PDF (476K) -
Tsutomu Ishimura1967 Volume 23 Issue 2 Pages 422-429
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWave functions of a hydrogen atom perturbed by an electric field are calculated under the assumption of a first-order Stark effect. It is assumed that the strength of the perturbation field is constant and its direction rotates around a fixed axis with a constant angular velocity. The ground state of the atom is not affected by the perturbation field. The energy level of the first excited state of the perturbed atom splits into nine sub-levels. The Lymann alpha line emitted from the perturbed atom consists of seven components. In the case where the angular velocity of the field rotation is small, the structure of the line is similar to that of the line emitted from an atom perturbed by a static field. In the case where, the angular velocity is large, it is similar to that of the line emitted from an unperturbed atom.View full abstractDownload PDF (824K) -
Tatsuo Tokuoka1967 Volume 23 Issue 2 Pages 430-435
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe birefringent properties of the isotropic Voigt-type viscoelastic material and those of Noll’s hygrosteric material are theoretically investigated on the basis of the electromagnetic and mechanical field equations and the constitutive equations. The birefringence of the Voigt-type material is expressed by a linear combination of stress and strain in the first-order approximation when the principal axes of stress and strain coincide. The variations of the birefringence with time during the pure stress relaxation of the linear fluent hygrosteric material are investigated. For incompressible material, stress-birefringence ratio is constant during relaxation process. On the other hand, for compressible material, the ratio decreases with time and tends to zero or a finite constant after long elapsed time.View full abstractDownload PDF (708K) -
Keishiro Niu, Ru-Jane Hung1967 Volume 23 Issue 2 Pages 436-444
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAn analysis is developed by the extension of Morawetz’s method. One of the assumptions which is different from Morawetz’s is the following; the ion and the electron have the same temperatures at x=−∞, in the uniform flow at far upstream. The analysis shows that the shock thickness is of order of the geometric mean of the gyroradii of the ion and the electron at x=−∞. Inside the shock, an electric field is induced by charge separation. This field causes the drift of electrons along the shock surface. Current by this drift of electrons increases the intensity of the magnetic field. Some of ions are expected to bounce many times at the front of the shock because of the existence of the electric field induced by the charge separation. As a result, they are expected to have large velocities in the neighborhood of the shock. These bouncing ions contribute to produce asymmetric fields before and after the shock wave.View full abstractDownload PDF (900K) -
Jyotirmoy Sinha Roy1967 Volume 23 Issue 2 Pages 444-448
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe present paper presents a study of the steady motion of an elastico-viscous liquid through the annulus between two coaxial right circular porous cylinders. It is assumed that the rate of fluid injection at one of the surfaces is the same as that of withdrawal at the other and the inner surface is moving with a constant velocity parallel to itself. The effects of the elasticity of the fluid and the cross-flow are characterized by non-dimensional numbers Rc (elastic number) and R (cross-flow Reynolds number). Their effects on the axial speed and the skin-friction have been represented graphically.View full abstractDownload PDF (344K) -
Akira Nakamura, Nobumori Kinoshita1967 Volume 23 Issue 2 Pages 449
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Hirotaka Yokoyama, Ryuji Watanabe, Shu Chiba1967 Volume 23 Issue 2 Pages 450
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Masao Watanabe, Syôhei Miyahara1967 Volume 23 Issue 2 Pages 451
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Toshinobu Chiba, Tadayasu Mitsui1967 Volume 23 Issue 2 Pages 452
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Noriaki Itoh, Tadashi Kawamata, Takashi Hirao, Hiroshi Kanzaki1967 Volume 23 Issue 2 Pages 453
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Masao Tomura, Tadayoshi Kitada, Shigeo Honda1967 Volume 23 Issue 2 Pages 454
Published: August 05, 1967
Released on J-STAGE: June 01, 2007
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Motoji Ikeya, Noriaki Itoh, Tokuo Suita1967 Volume 23 Issue 2 Pages 455-456
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Kaizo Nakamura, Yoshio Nakai1967 Volume 23 Issue 2 Pages 456
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Toshiaki Murakami1967 Volume 23 Issue 2 Pages 457
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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Touichi Okada, Tokuo Suita1967 Volume 23 Issue 2 Pages 458
Published: August 05, 1967
Released on J-STAGE: May 29, 2007
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