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Co–Mn ferrite thin films were prepared on a monocrystalline silicon substrate by a sol–gel process, and the influences of Mn3+ on the microstructure, magnetism, and polar magneto-optical Kerr effects of the as-deposited films were examined. The results reveal that doping of Mn3+ ions could effectively lower the TC of Co ferrite, and the Mn3+ substitution caused enhanced Kerr rotations due to the migration of Co2+ from the octahedral site to the tetrahedral site. A maximum rotation of 2.7° was produced by the stress in the metastable cubic structure of CoFe0.6Mn1.4O4 films.
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Zhou et al. (2001) studied this question.
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