Journal of the Physical Society of Japan
Online ISSN : 1347-4073
Print ISSN : 0031-9015
ISSN-L : 0031-9015
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Volume 40, Issue 2
Displaying 51-56 of 56 articles from this issue
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  • Lattice Relaxation at Antiphase Boundary in Gd2(MoO4)3
    Naoki Yamamoto, Katsumichi Yagi, Goro Honjo
    1976Volume 40Issue 2 Pages 601-602
    Published: February 15, 1976
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.601
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    A displacement in addition to that of the half lattice period was found to exist at the antiphase boundary of Gd2(MoO4)3 by means of electron microscopy. The displacement depends on orientation of the antiphase boundary, but is nearly in the a direction for the boundaries of all orientations except when it is in the b direction for the boundary parallel to the a axis. The displacement gives dilatation of the lattice at the boundary. These facts suggest that the antiphase boundaries have a finite width and a structure alike that of the tetragonal high-temperature phase.
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  • Self-Consistent Einstein Model and Surface Debye Temperature
    Takeo Matsubara
    1976Volume 40Issue 2 Pages 603-604
    Published: February 15, 1976
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.603
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    On the basis of a self-consistent Einstein model, which has been applied to a theory of melting of metallic fine particles in a previous publication, we discuss the problem of the surface Debye temperature. A semi-infinite metal crystal with a plane surface is considered and the vibrational frequency of each atom is self-consistly determined as function of atomic position. By making use of a simplified interatomic potential, an expression for the difference between square of the bulk and surface Debye temperatures is derived.
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  • Mobilities of CO2+ and N2O+ in He, Ar and N2 Gases
    Yozaburo Kaneko, Tetsuo Koizumi, Nobuo Kobayashi
    1976Volume 40Issue 2 Pages 605-606
    Published: February 15, 1976
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.605
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    It was found with an injected-ion drift tube apparatus that CO2+ and N2O+ ions have a remarkable bump in each mobility curve in Ar and N2 gases. The maxima of reduced mobilities appear in the E⁄N range from 80 to 200 Td, and their height is about 130% of the values at the lowest E⁄N studied. In He gas, neither of the ions have a bump, but their mobility curves decrease monotonically above 20 Td.
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  • Propagation of Test Waves in Plasmas with Ion Acoustic Turbulence
    Yoshinobu Kawai, Masaaki Hasegawa
    1976Volume 40Issue 2 Pages 607-608
    Published: February 15, 1976
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.607
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    By measuring the dispersion relation of test waves in plasmas with ion acoustic turbulence, we find that the phase velocity of the ion acoustic wave becomes smaller than the ion acoustic velocity for frequencies near the peak frequency of the turbulence spectrum.
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  • Toroidal Vortices in a Stratified Fluid
    Hiroyuki Honji
    1976Volume 40Issue 2 Pages 609-610
    Published: February 15, 1976
    Released on J-STAGE: May 29, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.609
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    Flow induced by a vertical circular cylinder making a rotatory oscillation about its axis in a stably stratified salt solution has been observed using the shadowgraph technique. A series of toroidal vortices formed along the cylinder were found remarkably stable as compared with those formed in a homogeneous fluid.
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  • N-Soliton Solutions of Model Equations for Shallow Water Waves
    Ryogo Hirota, Junkichi Satsuma
    1976Volume 40Issue 2 Pages 611-612
    Published: February 15, 1976
    Released on J-STAGE: June 01, 2007
    DOIhttps://doi.org/10.1143/JPSJ.40.611
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    N-soliton solutions of two model equations for shallow water waves are obtained. Both equations have the same linear dispersion relations and similar nonlinearities. One of them belongs to the class of equations solvable by the inverse scattering method and the other to the class of equations solvable by the dependent variable transformation method. The difference in forms between two solutions shows the difference in characteristics between two methods.
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