Magnetic Anisotropy from Exchange Interaction and Magnetic Structure of CoO
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概要
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The problem of alternative magnetic structure in CoO, the collinear structure or the multi-spin-axis structure, is discussed in connection with the origin of the large tilt angle of spin axes observed by neutron diffraction. Magnetic anisotropy energies from the orbital-momentum dependent exchange interaction in the two model structures are estimated and compared with the other contributions from Kanamori's mechanisms. It is shown that the spin axes can tilt by a large angle only in the collinear structure in virtue of a cancellation of the two contributions, one from the tetragonal deformation of the lattice and the other from the kinetic exchange. The situation is reversed in the multi-spin-axis structure. The multi-spin-axis model is therefore rejected from a theoretical point of view.
- 社団法人日本物理学会の論文
- 1974-05-15
著者
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Nakanishi Osamu
The Research Institute For Iron Steel And Other Metals Tohoku University
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Yamada Takemi
The Research Institute For Iron Steel And Other Metals
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