Frequency Shift and Damping Constant of Spin Waves in a Heisenberg Ferrimagnet with Uniaxial Anisotropy
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概要
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The explicit dependence of the frequency and damping constant of spin waves of a two-sublattice ferrimagnet, on temperature, exchange energy, anisotropy energy and wave number due to collisions among spin waves is studied theoretically, using the equation of motion and the correlation function methods. (i) The effect of anisotropy energy on the frequency shifts of both lower and higher mode spin wave is studied. (ii) The damping constants are calculated for several cases depending on the relative magnitudes of temperature, exchange energy and so on. (iii) Comparison is made with neutron scattering experiments on magnetite, and discussion is given in connection with desirable experiments.
- 理論物理学刊行会の論文
- 1971-09-25
著者
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Tani Kensuke
Department Of Chemistry Faculty Of Science Kyoto University
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Takemura Makoto
Department Of Chemistry Kyoto University
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Takemura Makoto
Department Of Chemistry Graduate School Of Science Osaka City University
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