Theory of Magnetic Structure of Zinc Ferrite
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概要
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The ground-state spin configuration of the normal cubic spinel ZnFe_2O_4 is studied on the basis of Heisenberg model with five different superex-change interactions. It is shown that three types of degenerate antiferro-magnetic configurations with wavevector Q=(2π/a, 0, π/a) are the ground spin atate on a straight line in the two-dimensional exchange-parameter space at fixed values of the other two parameters. Magnetic dipole-dipole interaction stabilizes four particular noncollinear antiferromagnetic configurations and gives a width to the line of stability. These four configurations give the same neutron diffraction line intensities which are in fairly good agreement with the observed intensities due to Konig et al.
- 社団法人日本物理学会の論文
- 1974-01-15