On the 90° Exchange Interaction between Cations (Cr^<3+>, Mn^<2+>, Fe^<3+> and Ni^<2+>) in Oxides
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概要
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Some empirical relations between the bond angle (of M-O^2-M) and the asymptotic Curie temperature (〓) or Neel temperature (T_N) are derived from data for oxides containing Cr^<3+>, Mn^<2+>, Fe^<3+> or Ni^<2+> ions. Further, these relations seem to be explained through assuming the presence of two types of exchange interactions; one is a 90° superexchange interaction which obeys the rule proposed by Kanamori and Goodenough, the other a direct exchange interaction which is sensitive to the overlap between neighboring two dε orbitals. In oxides containing Cr^<3+> or Mn^<2+> the above two types of exchange are effective, while in oxides containing Fe^<3+> or Ni^<2+> only the former (superexchange) effective.
- 社団法人日本物理学会の論文
- 1970-05-05
著者
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Miyahara Syohei
Department Of Physics Faculity Of Science Hokkaido University
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Motida Kiyosi
Department Of Physics Faculty Of Science Hokkaido University
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Matida Kiyoshi
Department of Physics, Faculty of Science, Hokkaido University
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