Local Structural Analysis of La-Co Substituted Ferrites by Neutron Diffraction and Synchrotron Radiation

Abstract

The La-Co substituted magnetoplumbite type (M-type) hexagonal ferrites are known to have the higher magnetic crystalline anisotropy compared with conventional M-type Sr ferrites. The site occupation of cation in the crystal structure has been analyzed by neutron diffraction and EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy in order to clarify the correlation between the local structural change and the improvement of the magnetic anisotropy. The EXAFS analysis has suggested that Co ions were located in the 4f₁, which showed good agreement with the results by neutron diffraction and XMCD analysis.