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Volume 55, Issue 3
Displaying 1-43 of 43 articles from this issue
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Chun-Yuan Yang, Hiroaki Itakura, Shigetake Horie, Yoshimi Tsuchiya, Ta ...1986 Volume 55 Issue 3 Pages 703-706
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSNematic liquid crystal cells which have a narrow width nearly the same as the thickness were found to exhibit a self-sustained angle-deflective oscillation of stripe pattern above a threshold applied voltage Vth. The amplitude of the oscillation was found to be proportional to (V2−Vth2)1⁄2. The voltage range where the oscillation occurs corresponds to the range of the fluctuating Williams domain which is observed for a rectangular cell with a wide width.View full abstractDownload PDF (336K) -
Katsuya Honda, Hiroyasu Toyoki, Mitsugu Matsushita1986 Volume 55 Issue 3 Pages 707-710
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA dimensional consideration is presented to obtain the fractal dimension D of the diffusion-limited aggregates which grow in a space with general dimensionality ds (any number ≥1) through deposition of diffusing particles following trajectories with a fractal dimension dw (Levy flight). We find rigorously D=(ds2+dw−1)⁄(ds+dw−1), which is in excellent agreement with many computer simulation results.View full abstractDownload PDF (440K) -
Takaaki Kajita, Katsushi Arisaka, Masatoshi Koshiba, Masayuki Nakahata ...1986 Volume 55 Issue 3 Pages 711-714
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWith a 3000 ton water Cherenkov detector, the nucleon decays into an antineutrino+mesons are searched for. No evidence for nucleon decay has been found during 474 days of detector live time. The lower limits on partial nucleon life time, τ⁄B, are 0.5−4.2×1031 yr at 90% C.L. depending on the nucleon decay modes.View full abstractDownload PDF (464K) -
Kotoyuki Okano, Yoichi Kawase, Yoshihiro Funakoshi1986 Volume 55 Issue 3 Pages 715-718
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA new nuclide 156Pm has been identified among the fission products of 235U using the on-line isotope separator (KUR–ISOL) for mass separation and identification. The atomic number has been identified by the energies of X rays and γ rays emitted. The half-life of 29±2 sec obtained for 156Pm is consistent with the prediction based on the gross theory of β-decay of Takahashi et al.View full abstractDownload PDF (408K) -
K. A. Müller1986 Volume 55 Issue 3 Pages 719-722
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Cr3+-oxygen-vacancy pair center, Cr3+–V0, in WO3 recently observed with EPR by Hirose and Kawaminami is analyzed using the Müller-Berlinger superposition model for Cr3+ as a basis. The large near-axial, ground-state splittings of 2.4 and 2.8 cm−1 at 300 K are accounted for by displacements of 0.12 to 0.18Å of the Cr3+ towards the oxygen vacancy, and distances of 1.90Å to the next four O2− ions. The structure is practically the same as that of the Fe3+–V0 center deduced earlier. The low-temperature splittings of Cr3+–V0 reported are also discussed.View full abstractDownload PDF (488K) -
Yoshio Kitaoka, Koh-ichi Ueda, Kenji Fujiwara, Hironobu Arimoto, Haruh ...1986 Volume 55 Issue 3 Pages 723-726
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIn the normal dense Kondo state of CeCu2Si2, the nuclear magnetic relaxation rate 1/T1 of 63Cu divided by T, 1/T1T is almost constant below 2.5 K with a slight increase near the superconducting transition temperature. Together with the results of other normal Kondo lattice compounds, it is concluded that the temperature dependence of 1/T1T at low temperatures does not scale to that of the specific heat divided by T, C(T)⁄T in Kondo lattice compounds in contrast with the case of dilute Kondo impurities. In the superconducting state, 1/T1T varies as T2, suggesting the gap zeros along lines, while the reported data of Cs(T)⁄T show no simple power law dependence. It is claimed that this difference below Tc may be correlated with the difference between 1/T1T and C(T)⁄T in the normal dense Kondo state.View full abstractDownload PDF (548K) -
Kazuyoshi Takeda, Norikiyo Uryû, Koji Ubukoshi, Kinshiro Hirakaw ...1986 Volume 55 Issue 3 Pages 727-730
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSStrong divergence of the magnetic heat capacity with the critical exponents α=0.59±0.05 and α′=0.28±0.05 has been found in the isotropic Heisenberg spin system with layered triangular lattice, VBr2, which gives an experimental support to the proposal of a new universality class of the critical exponents for frustrated systems.View full abstractDownload PDF (380K) -
Yuzuru Hosoe, K\={o}ki Takanashi, Hiroshi Yasuoka, Ry\={o} Suzuki, Yut ...1986 Volume 55 Issue 3 Pages 731-734
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSBismuth-substituted yttrium iron garnets have been studied with NMR measurement. The NMR signals of 209Bi nuclei were observed around 40 MHz corresponding to the internal field of 60 kOe. This value is about one order higher than the value expected from dipole field of ferric ions. This suggests the possibility of partial spin polarization of bismuth ion through the electron transfer from Bi3+ to Fe3+. This may cause the growth-induced anisotropy cooperating with preferential site ordering of bismuth ion.View full abstractDownload PDF (364K) -
Takashi Eshita, Katsumi Tanimura, Noriaki Itoh1986 Volume 55 Issue 3 Pages 735-738
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSTransient volume change induced by irradiation of KBr with an electron pulse and a subsequent laser pulse at 6 K has been measured by means of the photoelastic technique. Close correlation is found between the decay curves of the volume and optical absorption changes induced by an electron pulse and between those induced by a laser pulse subsequent to an electron pulse irradiation. By comparing the decay curves of the volume and optical absorption changes quantitatively, the volume change per transient F-H pair relative to that per self-trapped exciton is obtained to be 1.4±0.3. The result indicates that lattice relaxation around a close Frenkel pair is nearly of the same magnitude as that around a self-trapped exciton.View full abstractDownload PDF (476K) -
Satoshi Hashimoto, Minoru Itoh1986 Volume 55 Issue 3 Pages 739-741
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe absorption spectra have been measured on thin RbI crystals at 11 K. When the crystal thickness decreases below 0.5 μm, new absorption peaks are found to appear on the low-energy side of the n=1 and n=2 exciton bands. From measurements of the thickness dependence, these additional structures are interpreted as being due to the pure triplet exciton states induced by the strains in thin crystals.View full abstractDownload PDF (344K) -
Kuninosuke Imaeda, Tetsushoku Tei1986 Volume 55 Issue 3 Pages 743-752
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWe have found bifurcation and chaos phenomena of a nonlinear dynamical system expressed by a set of nonlinear ordinary differential equations under the influence of an external periodic force. The nonlinear system represents the Oregonator of the Belousov-Zhabotinskii reaction. We have found that the system performs bifurcation of multiperiodic oscillation mode and chaotic motion which are similar to those observed in the flow experiments of the Belousov-Zhabotinskii reaction by Hudson et al. and by Vidal et al.View full abstractDownload PDF (824K) -
Tohru Yoneyama1986 Volume 55 Issue 3 Pages 753-761
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInteracting (Int) Toda equations, certain coupled nonlinear difference-differential equations, are results of an extension or a decoupling of the Toda equation. By introducing new operators, the solutions of Int Toda equations are examined in detail starting from the exact. N-soliton solution of the original Toda equation, and their functional forms are obtained. Also functional forms of the solutions of the Flaschka equation are obtained.View full abstractDownload PDF (768K) -
Kin’ya Takahashi1986 Volume 55 Issue 3 Pages 762-779
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe quantum dynamics in Husimi representation is studied for the commutation relation, time development of distribution function and eigen distribution function. In the integrable system, the Husimi eigen distribution function is confined almost on the classical torus and can be approximated by Gaussian distribution with the variance (Δξl)2∼h⁄2 around the torus. Further, considering the correspondence between quantum and classical mechanics, the Husimi distribution function is a better representation than the Wigner distribution function, because coarse graining is usually involved in observational process.View full abstractDownload PDF (1772K) -
Saburo Homma, Hirokazu Tezuka1986 Volume 55 Issue 3 Pages 780-793
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWe analyze the photodisintegration process of two-nucleon systems in the nucleus in the energy region of the Δ33 resonance. The harmonic oscillator wave function and Hulthèn type wave function are used to describe the two-nucleon system in the nucleus, and a favorable wave function is determined to reproduce the experimental data.View full abstractDownload PDF (1192K) -
Nobuhiko Sakamoto1986 Volume 55 Issue 3 Pages 794-800
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSNumerical studies of the vibronic eigenstates in the case when an orbital triplet states is coupled linearly and quadratically to a t2 vibrational mode have been made. For a fixed value of the linear Jahn-Teller coupling strength in the intermediate coupling region, the effects of an E-type quadratic Jahn-Teller coupling strength on the vibronic eigenstates of the Jahn-Teller system have been investigated. As the quadratic Jahn-Teller coupling strength increases, the feature of an orthorhombic Jahn-Teller distortion has been clearly shown in the vibronic properties in the sixfold degenerate ground state.View full abstractDownload PDF (616K) -
Naoto Koyama, James C. Baird1986 Volume 55 Issue 3 Pages 801-805
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSPotential scattering and spin-exchange scattering cross sections in the energy range from 10−3 cm−1 to 100 cm−1 have been calculated numerically for hydrogen atoms in collision based on the most accurate Kolos-Woniewicz adiabatic potentials available at present. The scattering lengths for the singlet and triplet states are calculated to be a0s=0.595 a.u. and a0t=1.34 a.u., respectively. The quasi-bound state with ν=14 and l=4 is found to be at E=1.675 cm−1 above the dissociation limit. The thermally averaged spin-exchange cross section has the low temperature limit \barσex(0 K)=0.982 A2 with a minimum \barσex(2.5 K)=0.329 A2.View full abstractDownload PDF (580K) -
Yoshio Ueda, Osamu Naito, Shunjiro Shinohara, Kenro Miyamoto, Hiroshi ...1986 Volume 55 Issue 3 Pages 806-811
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSIon heating mechanism of fast magnetosonic wave in the ion cyclotron range of frequency (ICRF) has been studied in the TNT–A tokamak. Ion temperature measurements have been made with mass separated neutral particle analyser. The effects of the fundamental proton cyclotron resonance layer (ICR) and the two-ion hybrid resonance layer (HBR) on ion heating are observed. In the case of hydrogen minority (ICR and HBR in the plasma), where the ratio of hydrogen-to-deuterium concentration, nH⁄nD, is 0.05, the increase in hydrogen temperature is larger than that in deuterium, and most of RF power is absorbed by hydrogen.View full abstractDownload PDF (696K) -
Kenji Harafuji, Norihiko Sasaki, Hiroshige Watanabe1986 Volume 55 Issue 3 Pages 812-830
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSAnalytical and numerical studies on the design of vacuum magnetic field configuration produced only by planar non-circular coils with elliptical and triangular deformations are made systematically in a closed system with a three dimensional magnetic axis. The aim is to find out favorable configurations with a magnetic well, large rotational transform and small aspect ratio (∼10). The present study shows that it is difficult to realize the configuration which satisfies these requirements simultaneously, because of the deterioration and the destruction of magnetic surfaces in the outer region due mainly to the discreteness of coils. Supplementary measures for increasing the non-circularity of magnetic surfaces, which is appropriate from the engineering point of view, should be taken.View full abstractDownload PDF (2124K) -
Kazuyoshi Yamada, Akira Matsumoto, Nobuo Niimura, Toshiharu Fukunaga, ...1986 Volume 55 Issue 3 Pages 831-837
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe static structure factors of lead silicate glasses (PbO)x(SiO2)1−x (0<x<0.66) have been measured over a wide range of the scattering vector Q(=4π sin θ⁄λ) up to 30 A−1 by means of the pulsed neutron total scattering. The peak separation of Pb–O and O–O pair in the radial distribution function was first observed, and the average coordination number of the nearest oxygen atoms around lead atom was determined to be about three. The deformation of SiO4 tetrahedra was also observed as PbO concentration was increased. The detailed radial distribution analysis based on the pair distributions of the corresponding crystal structure strongly suggests the coexistence of different kinds of Pb–O bond with different distances in the glass system.View full abstractDownload PDF (800K) -
Susamu Taketomi1986 Volume 55 Issue 3 Pages 838-844
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe sound attenuation coefficient of magnetic fluid under an external magnetic field varies with the angle φ between the field and the sound propagation. We attribute the cause of this anisotropy to the two motions of the clusters of the ferrous colloidal particles in the fluid. One is the rotational motion of them, which we analyze using liquid crystal theory, the other is the translational motion of them, which we analyze assuming the model of a vibrating sphere in viscous fluid. The theory interprets the two peaks of the attenuation coefficient curve ranging from φ=0 to φ=π⁄2.View full abstractDownload PDF (728K) -
Kunihiko Iwasaki1986 Volume 55 Issue 3 Pages 845-852
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInternal friction and the period of vibration of an orderable alloy Au3Cu are measured as functions of temperature between about 310 K and 870 K both in heating and in cooling runs with a fully automatic torsion pendulum. Three internal friction peaks PT, PZ and PG are observed at about 490 K, 625 K and 760 K, respectively. The peak PT which appears only in a quenched specimen and anneals out around its peak temperature is considered to be related to a rapid order-disorder transition enhanced by excess vacancies. The peaks PZ and PG are identified with the Zener peak and the grain boundary peak, respectively. The effects of heat treatments and deformation on these peaks are investigated, and the results are compared with those of a similar alloy Cu3Au.View full abstractDownload PDF (840K) -
Yasuo Nishihata, Hirofumi Sakashita, Hikaru Terauchi, Shunsuke Takenak ...1986 Volume 55 Issue 3 Pages 853-859
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSX-ray diffraction and EXAFS measurements have been carried out in a mixture of two kinds of liquid crystals; 4-(4-heptyloxy-benzoyloxy) benzylidene-4-cyanoaniline 45.5 mol% and 4-cyanophenyl 4-(4-nonyloxy-3-bromobenzoyloxy) benzoate 54.5 mol%, where the phase transitions occur as following sequence with decreasing temperature; isotropic liquid, nematic, smectic-Ad(1), reentrant nematic, smectic-Ad(2) and solid phases. It is found that in the reentrant nematic phase, the smectic-Ad(1) phase and the smectic-Ad(2) phase coexist with the short-range ordering. The local structures obtained from the EXAFS spectra in the directions parallel and perpendicular to the director (long axis of molecule) of the liquid crystal are discussed.View full abstractDownload PDF (736K) -
Kunihiko Yamaji1986 Volume 55 Issue 3 Pages 860-864
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe two-dimensional Hubbard model approximating the Bechgaard salts is refined by introducing the second harmonics in the b·k dependence which enable to better reproduce the k-dependence of the one electron energy near the Fermi surface. The nesting-breaking component among the second harmonics is found to contribute a new term as important as the known one to the stability criterion of SDW. New transfer energy data reveal that this term is prominently enhanced at low temperatures and further with increased pressure, which clarifies the properties of the title in the light of the modified criterion.View full abstractDownload PDF (660K) -
Hidetsugu Kitatani, Seiji Miyashita, Masuo Suzuki1986 Volume 55 Issue 3 Pages 865-876
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe relation between reentrant phenomena and the ground state degeneracy due to competing interactions has been investigated by an exact investigation of the singularity of the free energy in some two-dimensional Ising models with competing periodic nearest neighbour interactions. Thermodynamic properties, in particular, magnetic properties of the system have been studied, which are shown to have similarities to some experimental results on spin glass phenomena.View full abstractDownload PDF (1120K) -
Kohji Yamakawa, Kazuki Nunogaki, Francisco Eiichi Fujita1986 Volume 55 Issue 3 Pages 877-884
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSHydrogen isotopes, H and D, were dissolved in excess in copper by means of the liquid hydrogen quenching technique and their diffusion process at temperatures between 220 K and 350 K was studied by the electrical resistivity measurement. In this temperature range, an abnormal mass effect in diffusion was observed. The activation energies of diffusion of the isotopes were; EH=34.3 kJ/mol and ED=36.1 kJ/mol for hydrogen and deuterium, respectively. The relation, EH⁄ED<1, is not expected from the classical diffusion theory, and the ratio of diffusion constant, DH⁄DD, increased with decreasing temperature, exceeding the classical value, \sqrt2, in the lowest temperature region in the present experiment. The observed behaviour is explained by a tunneling diffusion mechanism as in the case of hydrogen diffusion in nickel.View full abstractDownload PDF (740K) -
Daijiro Yoshioka1986 Volume 55 Issue 3 Pages 885-896
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSExcitation energy spectrum of two-dimensional electrons in a strong magnetic field is investigated by diagonalization of the Hamiltonian for finite systems. Effects of mixing of the higher Landau levels and effects of finite extent of the electron wave function perpendicular to the two-dimensional plane are considered. The results are compared with the experiments on GaAs–AlGaAs heterostructure at ν=1⁄3 and ν=2⁄3, where ν is the filling factor of the Landau levels.View full abstractDownload PDF (1368K) -
Katsuyoshi Watanabe, Tsutomu Karasawa, Teruo Komatsu, Yozo Kaifu1986 Volume 55 Issue 3 Pages 897-907
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInterface excitons caused by stacking faults in BiI3, crystals have been investigated on absorption, photoluminescence and its excitation spectra. Characteristic three sharp absorption lines (called R, S and T), appear close to the fundamental absorption edge. The temperature dependence of the line shape shows a typical feature of exciton-phonon interaction in the case that K=0 at the bottom of the exciton band. Resonant luminescences of these lines have also very narrow line widths, and no Stokes shifts can be detected. The luminescence line shape of phonon side band shows Maxwellian-like having the line width proportional to thermal energy but accompanied by a fine structure which reflects a quasi two-dimensional band nature of this exciton system. The high density excitation effects of these states reveal a specific interaction among the R, S and T excitons.View full abstractDownload PDF (1268K) -
Hiroshi Mano1986 Volume 55 Issue 3 Pages 908-919
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic properties of a random mixture of two antiferromagnets with competing Ising and XY anisotropies are investigated in a pair-spin theory which is derived by expanding the free energy into a cluster series and taking pair-spin clusters into account. In the present theory local environment effect is naturally taken into consideration. The present calculation confirms that the Ising anisotropy maintains its character more strongly than the XY anisotropy when they compete. One of the interesting results is that in some cases the magnetic susceptibility does not show appreciable anomaly at the transition point between the OAF phase and the antiferromagnetic phase. In the OAF phase the direction of the thermal average of each spin scatters depending on the local atomic configuration around it. The distribution is almost uniform when the anisotropy is strong.View full abstractDownload PDF (1364K) -
Yoshikazu Nishihara, Yuji Yamaguchi1986 Volume 55 Issue 3 Pages 920-935
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetization and Mössbauer measurements reveal that hexagonal Laves phase compounds Sc1−xTixFe1.95, with 0.3<x<0.7 have two ferromagnetic states with different degrees of localization. The magnetic transition from one ferromagnetic state to the other more delocalized state takes place at ∼70 K with increasing temperature in Sc0.35Ti0.65Fe1.95 with TC=360 K. At 500 K the magnetic state changes again to the more localized state with a smaller effective paramagnetic moment. The unit cell volume discontinuously decreases by ∼1.1% at ∼70 K and its temperature derivative becomes small at ∼500 K with increasing temperature. The results were analyzed with universal expressions derived from the spin fluctuation theory by Moriya for the magnetic susceptibility and the average of the squared local amplitude of spin fluctuation. The temperature variation of the mean square local amplitude of spin fluctuation explains consistently the temperature dependence of spontaneous volume magnetostriction and the susceptibility of Sc0.35Ti0.65Fe1.95 up to ∼700 K.View full abstractDownload PDF (1684K) -
Shoji Ishida, Setsuro Asano, Junji Ishida1986 Volume 55 Issue 3 Pages 936-945
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe electronic structures of YMn2Ge2, LaMn2Ge2 and LaCo2Ge2 were calculated by the KKR method in the framework of the LSD approximation. The electronic structures of the three compounds are similar and in these structures we can see the characteristics of the s, p and d bands of the constituent atoms for ThCr2Si2 type compounds. Using these electronic structures, we can roughly guess the magnetism of other compounds by the rigid-band-model; YMn2Si2, LaMn2Si2, and LaCo2Si2 are an antiferromagnet, a ferromagnet and a paramagnet, respectively. We find also that it is very delicate whether or not the Fe in RFe2X2 (R=Y, La and X=Si, Ge) carries a magnetic moment, as indicated by the experimental results.View full abstractDownload PDF (920K) -
Nahonori Miyata, Kaoru Tomotsune, Hiroyuki Nakada, Makoto Hagiwara, Hi ...1986 Volume 55 Issue 3 Pages 946-952
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic crystalline anisotropy of Pd1−xFex (0.1\lesssimx\lesssim0.3) in cubic phase was studied by torque method. An abrupt change was found in the composition dependence of anisotropy constant K1 at 4.2 K around x=0.17: from +17×104 erg/cm3 for x=0.16 to −6×104 erg/cm3 for x=0.18. Values of K1 for x=0.26 and 0.33 were negative (−1.2 and −2.6 in 104 erg/cm3 at 4.2 K, respectively) in the quenched state, while, after annealing, they became positive at 4.2 K (+7.0 and +13.0 in 104 erg/cm3, respectively) and changed their sign with increasing temperature. In the region of 0.3\lesssimx\lesssim0.6, torque curves of quenched specimens depended strongly on magnetic field strength. The results on this region will be presented in the next paper (Part II).View full abstractDownload PDF (772K) -
Nahonori Miyata, Makoto Hagiwara, Haruo Kunitomo, Shinichi Ohishi, Yuk ...1986 Volume 55 Issue 3 Pages 953-960
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFerromagnetic crystalline anisotropy of Pd1−xFex in the range of 0.3\lesssimx\lesssim0.6 was studied by torque method. Because this composition range included tetragonal L10-type superstructure, all specimens were quenched, as rapidly as possible, for realizing cubic structure. In spite of such heat treatment, observed torque curves included a 2-fold symmetry part and their shape was strongly influenced by intensity of magnetic field. These characters suggest coexistence of regions with uniaxial anisotropy in the specimen. They appeared more obviously in the specimen of x=0.42 compared to that of x=0.48. Analysis of the experiment suggests that the usual assumption of neglecting magnetic interaction among regions should be corrected.View full abstractDownload PDF (948K) -
Nahonori Miyata, Makoto Hagiwara, Yuko Ichiyanagi, Kuniaki Kuwahara, H ...1986 Volume 55 Issue 3 Pages 961-963
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effect of annealing on the ferromagnetic crystalline anisotropy constant K1 of Pd1−xCox alloys was studied in connection with a short range order structure. Compositions of alloys are x=0.27, 0.30, 0.48 and 0.76. No evidence of occurrence of uniaxial magneic anisotropy was observed for annealed specimen with x=0.48, contrary to the case of quenched PdFe alloys with nearly the same composition which show torque curves changing with magnetic field strength. Negative K1 was obtained for all specimens in the observed temperature range (below room temperature). The absolute value of K1 in annealed state was larger than that in quenched one. The difference was obvious for x=0.27 and 0.30 (about 10% at 77 K), while that for x=0.48 and 0.76 (a few per cent) was close to the experimental error.View full abstractDownload PDF (324K) -
Masayuki Itoh, Hiroshi Yasuoka, Allan R. King, Vincent Jaccarino1986 Volume 55 Issue 3 Pages 964-972
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe decay of the 19F nuclear magnetization P(t) of the F− ions with no magnetic nearest neighbors has been studied in the diluted antiferromagnets FexZn1−xF2 and MnxZn1−xF2 at T>TN. If one represents P(t) by the function exp {−(t⁄T1)n}, it is found that n varies from 1 to 0.5 with decreasing x for the long time decay, but n is unity independent of x for the initial decay at 300 K. This characteristic behavior is explicable using the theory of Thayamballi and Hone for P(t) in diluted antiferromagnets.View full abstractDownload PDF (812K) -
Masuo Fukui, Shusei Tago, Kenji Oda1986 Volume 55 Issue 3 Pages 973-980
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe angular spread of fundamental Gaussian beam is comparable to the half-width of angle-scanned ATR spectra of long-range surface plasmon polaritons (L–SP’s). By taking into account such a beam divergence, we therefore investigate characteristics of L–SP’s excited by the fundamental Gaussian beam and present numerical results on the ATR spectra and spatial profiles of reflected light intensity.View full abstractDownload PDF (668K) -
Masanori Cho, Masao Kodama, Toshirou Yagi1986 Volume 55 Issue 3 Pages 981-986
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe Brillouin scattering spectra of B2O3 glass have been observed as a function of temperature is a range from 300 K to 630 K over the glass transition temperature Tg. The Brillouin frequency shifts of both the longitudinal and the transverse modes are almost independent of temperature below Tg, and show a gradual decrease with increasing temperature above Tg. An analysis is proposed using a modified two-state model, where a freezing of the two-state system was assumed and a background term in the free energy was taken into consideration. The model gives us a consistent description of the temperature dependence of the Brillouin frequency shift with the other quantities, the specific volume and the heat capacity.View full abstractDownload PDF (692K) -
Iwao Mogi, Tama Okamoto, Norimichi Kojima, Toshiro Ban, Ikuji Tsujikaw ...1986 Volume 55 Issue 3 Pages 987-992
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe crystal field absorption spectra in the near infrared to visible regions of CsCoCl3·2H2O were investigated. All of the absorption bands were well assiged by taking the crystal field and Racah parameters as Dq=720 cm−1, B=920 cm−1 and C=4320 cm−1, respectively. In the spin forbidden transition 4T1(4F)→2T1(2P) the exciton line and its magnon sideband were observed. The one-dimensionality of magnetic properties is reflected in the temperature dependence of the peak energy and the integrated intensity of the magnon sideband.View full abstractDownload PDF (620K) -
Toshiaki Kakitani1986 Volume 55 Issue 3 Pages 993-1010
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSFor the purpose of analyzing the very rapid (tens to hundreds of femto-second) dynamics in the excited state of molecular solutions, we have derived an equation of motion for the time-correlation function of the transition dipole moment, which is related to an optical absorption spectrum by a Fourier transformation. We have solved the above equation in the case of weak solute-solvent interaction, assuming the Gauss process for field-fluctuation and force-fluctuation applied to the vibration of a solute molecule by the random collision of solvent molecules and by anharmonic vibration. By means of a systematic analysis of the absolute value and the phase angle of the time-correlation function, we can separate the properties of the intrinsic, excited state dynamics from the field-fluctuation effect. We have exemplified how the dynamical relaxation parameters are evaluated from the experimentally obtained absorption band 1A1g→1B2u of dilute benzene solutions.View full abstractDownload PDF (1756K) -
Masahiko Kato1986 Volume 55 Issue 3 Pages 1011-1020
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSThe effects of electron-hole pair excitations on the energy dissipation into metal from the charged beams scattered by metal surfaces are studied. The energy distribution of ions is originated from two reasons. The one is uncertainty in the path taken along by ions. The other reason is stochastic properties of excitation processes, e.g. phonons, plasmons and electron-hole pair excitations. The scattering angle dependent energy distributions of ions due to electron-hole pair excitations are derived and explicit calculations are done for the normal incident and the grazing incident cases.View full abstractDownload PDF (884K) -
Kimie Nakashima, Naokata Takeyama1986 Volume 55 Issue 3 Pages 1021-1029
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSA close correlation has been found for 60 aqueous ions between the standard entropy of hydration ΔSh0(ion) and the square of the ionic Stokes radius rs(ion). Above all, the following relation holds for 37 ions; ΔSh0⁄4πrs2N=ΔScw0⁄4πrew2N=−3.44×10−8 J K−1 cm−2 at 298 K. Here N is the Avogadro constant, rew twice the Stokes radius of water, and ΔScw0 the standard entropy of condensation of water vapor at 298 K. This relation is extended to other 23 ions by introducing an effective ionic radius re(ion) in place of rs(ion) to conserve the relationship mentioned above. In general, there is the relation of re(ion)=rs(ion)+δrs with δrs≥0, to show an expansion δrs of ionic Stokes spheres due to the participation of loosely hydrated water in the equilibrium static state of ΔSh0(ion).View full abstractDownload PDF (852K) -
I. Hosokawa, K. Yamamoto1986 Volume 55 Issue 3 Pages 1030-1031
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (288K) -
Michio Ohji, Shinji Shionoya, Kenji Amagai1986 Volume 55 Issue 3 Pages 1032-1033
Published: March 15, 1986
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (304K) -
Riki Kawashima1986 Volume 55 Issue 3 Pages 1034-1035
Published: March 15, 1986
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (264K)
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