Origin of Magnetic Anisotropy in CoxFe3−xO4
- 1 March 1958
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 29 (3) , 448-449
- https://doi.org/10.1063/1.1723176
Abstract
A model is proposed to explain the large part of the ferromagnetic anisotropy energy of CoxFe3−xO4(where x is small) which is caused by the presence of Co2+. The residual orbital angular momentum α(∼) of Co2+ is constrained by the crystal field to lie parallel to the axis of threefold symmetry. Spin‐oribt energy λL·S couples the spin to this axis, accounting for the anisotropy energy. By fitting the theory to experimental anisotropy data, one finds that |αλ| = 132 cm−1. The assumption that cations are mobile at higher temperatures leads to an explanation of the anisotropy induced by magnetic annealing.This publication has 2 references indexed in Scilit:
- Magnetic Annealing Effect in Cobalt-Substituted Magnetite Single CrystalsPhysical Review B, 1957
- Some Properties of Ferrites in Connection with Their ChemistryProceedings of the IRE, 1955