To study magnetic states in ferrimagnetic Fe-oxides, we have measured magnetic circular x-ray dichroism at K-edge of 3d-transition metal. The observed dichroic signals are separately assigned to the contribution come from 3d-cation in tetrahedral or octahedral sites. We discuss the magnetic states of 3d-metal ion in terms of local enviroment.
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Kawamura et al. (1997) studied this question.