Theory of Spin-Dependent Phonon Raman Scattering in Magnetic Crystals

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概要

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• A general theory of the spin-dependent phonon Raman scattering in magnetic crustals is developed. The integrated Raman intensity as a function of temperature is expressed as S(T)=(n_0+1)|R+M<S_0・S_1>|^2, where the first term represents the spin-independent part and the second one the spin-function <S_0・S_1>. Three types of temperature variation of intensity are predicted in ferromagnetic and antiferromagnetic cases, depending on values of R/M. Two microscopic mechanisms, nariation of the d electron transfer with lattice fibrations and that of the non-diagonal exchange, contribute to the spin-dependent part, and it is shown that the former is essentially important in producing the large temperature variation. The theory is applied to explaining the observed temperature variation of various Raman active phonon modes in CdCr_2S_4 and the experimental results are explained successfully.

• 社団法人日本物理学会の論文
• 1973-10-05

著者

• SUZUKI Naoshi

  Department of Material Physics,Faculty of Engineering Science,Osaka University

• KAMIMURA Hiroshi

  Department of Physics,Faculty of Science,University of Tokyo

• Suzuki Naoshi

  Department Of Material Phsics Faculty Of Engineering Science Osaka University

• Suzuki Naoshi

  Department Of Physics Faculty Of Science The University Of Tokyo:(present Address) Faculty Of Engine

• Kamimura Hiroshi

  Department Of Applied Physics . Faculty Of Science Tokyo University Of Science

• Kamimura Hiroshi

  Department Of Physics Faculty Of Science The University Of Tokyo

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