Abstract
Summary A sample of titanomagnetite Fez.,Ti,.,O,, made by the usual sintering technique was wet ground prior to oxidation in air. The saturation magnetization was found to decrease with oxidation in contrast to previous investigations which had been carried out using open air grinding This result is compared to theoretical models for cation distribution in oxidized titanomagnetites and found to be consistent with the production of a single phase spinel oxidation product. The cause of the apparent NCel P-type thermomagnetic curves of the oxidized materials is discussed on the basis of anisotropic Fez+ ion in octahedral sites and intra-sublattice interactions. It is hoped that a more detailed study may reveal materials with N-type ferrimagnetism-one of the classic mechanisms for self-reversal.
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