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- Proceedings of the Physico-Mathematical Society of Japan. 3rd Series
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- Tokyo Sugaku-Butsurigakukwai Kiji-Gaiyo
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Volume 53, Issue 8
Displaying 51-67 of 67 articles from this issue
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Zbigniew M. Stadnik, Yoriyoshi Kawai1984 Volume 53 Issue 8 Pages 2761-2770
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSMagnetic properties of single crystals of the non-stoichiometric spinel Zn0.36Mn0.57Fe2.07O4 have been studied by 57Fe Mössbauer spectroscopy. The divalent Fe ions are located only at octahedral sites. The cation distribution was deduced from a spectrum taken with a large magnetic field applied to the sample. A value of the lattice constant was calculated from the distribution and is consistent with a value measured by X-ray diffraction. The magnetic moments of Fe ions are shown to be collinear. Mössbauer spectra confirm that below about 240 K the easy magnetic axis is along the [111] direction. A significant influence of residual stress anisotropy on the intensities of Zeeman lines is observed at temperatures close to 240 K.View full abstractDownload PDF (992K) -
Yuji Matsuda, Yuji Ito, Masakazu Nishi1984 Volume 53 Issue 8 Pages 2771-2777
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSEPR line widths and the resonance field of CsFeS2, the quasi one-dimensional alternating antiferromagnet, are measured as a function of the angle between the chain axis and the external applied field, and of the temperature over the range of 100 K and 500 K. The line widths are much broader than those of the similar compounds like KFeS2, which is the usual quasi one-dimensional antiferromagnet; and the relaxation mechanism responsible for the extra line width is attributed to the singlet ground state of the alternating chain system.
Although the observed angular and temperature dependence of the line width could well be explained by the short time spin correlation due to the intra-chain exchange interaction; for the shift of the resonance field towards the higher field side irrespective of the applied field direction as temperature is lowered, no satisfactory explanation was found.View full abstractDownload PDF (652K) -
Jun Hatano, Fujio Suda, Fumihiro Aikawa, Hideo Futama, Bozena Hilczer1984 Volume 53 Issue 8 Pages 2778-2783
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSSpiral patterns due to screw dislocation have been revealed by a charged-powder deposition technique on cleavage surfaces in {0001} growth region of ferroelectric guanidinium aluminum sulfate hexahydrate crystals grown from aqueous solution of high temperatures (60°C–95°C). The patterns are observed not as surface topography on the natural faces of crystal, but as charge distribution on the cleavage surfaces in the crystal. Dislocation etch pits found at the center of the spirals are direct evidence for the spiral growth of crystal along the trigonal axis. The rotational motion of the spiral patterns during crystal growth is discussed on the basis of the spiral growth theory.View full abstractDownload PDF (1724K) -
Minoru Sumita, Toshio Osaka, Yasuharu Makita1984 Volume 53 Issue 8 Pages 2784-2789
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDielectric, pyroelectric and thermal properties of the crystals of monoclinic Rb1−xCsxD2PO4 system were studied from −190°C to 120°C. The phase diagram of the system was established in the whole range of x. The crystal of x=0 has three phases denoted as I, II and III in order of the descending temperature. As x increases from zero, a ferroelectric IV phase appears between the phases III and II, and the temperature range of the phase TV spreads. The III–IV and IV–I transition entropies are distinctly small in comparison with those for the III–II, II–I and IV–II transitions.View full abstractDownload PDF (596K) -
Kiyoshi Deguchi, Shin-ichi Sato, K\={o}ji Hirano, Eiji Nakamura1984 Volume 53 Issue 8 Pages 2790-2798
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDielectric dispersion has been studied for several crystals of Rb2ZnCl4 prepared under different conditions in the frequency range from 103 Hz to 109 Hz around the incommensurate-commensurate phase transition temperature Tc. Although the dielectric dispersion of the relaxational type is observed for all the crystals, the apparent critical slowing down is found only for the less defective crystals in which the relaxation is monodispersive in the temperature range T>Tc+5 K, but becomes polydispersive near Tc in the incommensurate phase. In the defective crystals, a wide distribution of the relaxation times was observed in the whole temperature range of the incommensurate phase.View full abstractDownload PDF (708K) -
Kenichi Mizuno, Atsuo Matsui, G. J. Sloan1984 Volume 53 Issue 8 Pages 2799-2806
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSPolarized absorption spectra of tetracene (naphthacene) single crystals have been investigated between 300 and 13 K, with particular emphasis on the b-polarized spectrum. The low energy tails of the a- and b-polarized first absorption bands are expressed by the Urbach rule with the steepness coefficients σa′=1.37±0.12, σb′=1.58±0.13, with which possibility of self-trapping of excitons is discussed along with the dimensionality of tetracene crystals. The exciton-phonon coupling constants are found to be ga=1.09±0.1 and gb=0.95±0.08, consistent with luminescence experiments which show that excitons in tetracene are self-trapped very shallowly. The line halfwidth, the oscillator strength of the first and the second absorption bands, refractive indices, and surface exciton structure are briefly discussed.View full abstractDownload PDF (908K) -
Yoshihiro Ohmura, Tadasu Suzuki1984 Volume 53 Issue 8 Pages 2807-2817
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSInelastic scattering of X-rays by an inner-shell electron in solids is treated theoretically under the condition of 2πa⁄λ0<1 and 10I\gtrsimhν0\gtrsimI, where λ0 and hν0 are a wavelength and an energy of the incident X-rays and a and I are the radius and the ionization energy of the inner-shell electron, respectively. In this case, the contribution by the p·A-term in the Hamiltonian is not negligible compared to that by the A2-term, but gives an appreciable p·A band in the scattering spectrum. As an example, the scattering of soft X-rays by K-electrons in lithium is treated. The result shows the cross-over of the spectral intensity from the A2-term dominant Raman band to the p·A-term dominant band as hν0 becomes smaller. An experiment using the monochromatic bright radiation from an undulator equipped in a synchrotron orbit would be useful to confirm the present theory.View full abstractDownload PDF (1148K) -
Atsuo Matsui, Kenichi Mizuno, Hitoshi Nishimura1984 Volume 53 Issue 8 Pages 2818-2827
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSLow temperature luminescence and absorption spectra in β-perylene crystals are investigated. Zero-phonon transitions in which self-trapped exciton states participate in as the initial or final state are found below 30 K. The self-trap depth for the shallower self-trapped exciton state is found to be 95 cm−1 and for the deeper self-trapped exciton state 187 cm−1. Lattice configurations for self-trapped states are suggested to be one-center type for the deeper self-trapped exciton state and two-center type for the shallower self-trapped exciton state. Based on the discussion about the intensities of zero-phonon lines, it is suggested that phonons of the energies of 13.3 cm−1 are taking part in relaxating free excitons into the shallower self-trapped excitons and 22 cm−1 into the deeper self-trapped excitons.View full abstractDownload PDF (1188K) -
Hiroshi Dohi, Yuji Kuwamura, Masuo Fukui, Osamu Tada1984 Volume 53 Issue 8 Pages 2828-2832
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWe have numerically and experimentally investigated the propagation characteristics of surface plasmon polaritons (SP’s) in metal films bounded by materials with very similar refractive indices. The calculation indicates that the SP’s can propagate over macroscopic distances in the visible region. ATR experiments for angle scans (glass prism-index matching oil-Ag film-Pyrex glass) have shown that a propagation length of ∼200 μm can be readily gotten at 632.8 nm wavelength under an appropriate condition.View full abstractDownload PDF (460K) -
Yoshitomo Yokota, Masuo Fukui, Osamu Tada1984 Volume 53 Issue 8 Pages 2833-2836
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSWe have determined the plasma frequency and the relaxation time of electrons in the infrared region for heavily doped Si crystal through the excitation of surface plasmon polaritons (SP’s). The dispersion relations of SP’s on n+-Si have been theoretically and experimentally obtained.View full abstractDownload PDF (384K) -
Tomoyuki Matsuura, Takashi Fujikawa, Hiroyuki \={O}yanagi1984 Volume 53 Issue 8 Pages 2837-2844
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSX-ray absorption near edge structure (XANES) spectra for crystalline GaAs and ZnSe are measured for each K-edge region. Full multiple scattering calculations are also performed. The information on the charge distribution around the X-ray absorbed atom can be obtained if we compare the experimental XANES spectra with full multiple scattering calculations. In these systems core hole potential is important to analyse the spectra.View full abstractDownload PDF (784K) -
Masaharu Tokunaga1984 Volume 53 Issue 8 Pages 2845-2850
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSA simple phenomenological theory is presented to discuss the origin of elastic “central peaks” observed near structural phase transition temperatures by light scattering. The scattering intensity IC of light from the polarization induced around a charge impurity is formulated on the analogy of the Huang scattering of X-rays. The dependence of IC on the direction of the scattering wave vector and temperature has been numerically computed and is found to reproduce well the experimental results in KD2PO4. The theory is shown to be applicable to the “central peak” due to the strain induced around an elastic defect observed in KH2PO4 or KH3(1−x)D3x(SeO3)2.View full abstractDownload PDF (728K) -
Tatsuo Iwasa, Yoshiro Suzuki, Tomoyuki Nakayama, Fumio Tokunaga, Masam ...1984 Volume 53 Issue 8 Pages 2851-2856
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSThe reverse photoreaction from batho-intermediate of bacteriorhodopsin has been investigated by picosecond laser flash photolysis at 6.5 K. Upon exciting batho-intermediate with 694 nm light pulse of 31±4 ps width, the increase of absorbance around 570 nm and concomitant decrease of that around 630 nm are observed without delay time. Based on the above result, the models for the primary photochemical reaction of bacteriorhodopsin are discussed.View full abstractDownload PDF (660K) -
Toshiaki Kakitani1984 Volume 53 Issue 8 Pages 2857-2858
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (148K) -
Iwao Hosokawa1984 Volume 53 Issue 8 Pages 2859
Published: August 15, 1984
Released on J-STAGE: June 01, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (132K) -
Takashi Iwashita, Norikiyo Uryû1984 Volume 53 Issue 8 Pages 2860A
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (48K) -
Sumiyoshi Fujiki, Keisei Shutoh, Shigetoshi Katsura1984 Volume 53 Issue 8 Pages 2860B
Published: August 15, 1984
Released on J-STAGE: May 29, 2007
JOURNAL RESTRICTED ACCESSDownload PDF (28K)