Spin Dynamics of the Half-Integer-Spin Quasi-One-Dimensional Heisenberg Antiferromagnet CsMnI_3
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概要
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Magnetic excitations of CsMnI_3, a quasi-one-dimensional Heisenberg antiferromagnet with S=5/2, have been measured by means of inelastic neutron scattering. Magnetic excitations in the low temperature phase are in good agreement with the predictions of the conventional linear spin-wave theory. In particular, in accordance with the linear spin-wave theory, we found three separate modes at Q=(0, 0, 1) instead of a threefold degenerate mode as seen in CsNiCl_3 (S=1). It confirms that the spin dynamics of the integer spin value system are very different from those of the half-integer spin value system, even in their three-dimensionally ordered phase. Magnetic excitations in the intermediate phase have been also studied and it is found that the excitations were similar to those in the low temperature phase, except some over-damped intensities at certain reciprocal points. These intensities can be associated to the slow rotational motions of the spins around the c-axis.
- 社団法人日本物理学会の論文
- 1994-04-15
著者
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TANAKA Hidekazu
Department of Natural History Sciences, Faculty of Science, Hokkaido University
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Inami Toshiya
Institute For Solid State Physics University Of Tokyo:advanced Science Research Center Japan Atomic
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KAKURAI Kazuhisa
Institute for Solid State Physics,The University of Tokyo
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Inami Toshiya
Institute For Solid State Physics University Of Tokyo
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Kakurai Kazuhisa
Institute For Solid State Physics University Of Tokyo
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Steiner M
Hahn‐meitner‐inst. Berlin Deu
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Enderle Mechthild
Institut Fur Physik Johannes-gutenberg-universitat
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Steiner Michael
Hahn-Meitner-Institut
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Tanaka Hidekazu
Department Of Internal Medicine Iii Osaka Medical College
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Tanaka Hidekazu
Department Of Earth And Planetary Sciences Faculty Of Science Tokyo Institute Of Technology
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Tanaka Hidekazu
Department Of Chemistry And Chemical Biology Gunma University
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