Collective Motion of Spins in Ferro- and Antiferromagnets

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概要

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• ^+A brief account of the present work is published in the proceedings of the International Conference on Magnetism and Crystallography in Kyoto, published by the Physical Society of Japan, 1962. A new approach to the calculation of the temperature dependence of pin wave frequencies in ordered spin state is proposed. The results for ferromagnets agrees with Keffer's expression. Spin wave frequencies in antiferromagnets in the presence of an anisotropy energy are also calculated. By the present approach it is shown that the antiferromagnetic resonance frequency can be expressed phenomenologically in terms of anisotropy constants and static susceptibilities. The obtained expression of the resonance frequency is valid in any statistical approximation. The observed temperature dependence of the resonance frequency in MnF_2 is discussed by use of this result.

• 社団法人日本物理学会の論文
• 1962-09-05

著者

• TACHIKI Masashi

  Department of Chemistry, Faculty of Science, Osaka University

• Kanamori Junjiro

  Department Of Physics Faculty Of Science Osaka University

• KANAMORI J.

  Department of Physics, Osaka University

• Tachiki Masashi

  Department Of Chemistry Faculty Of Science Osaka University:(present Address) The Research Institute

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