A magnetic study of single-crystal titanomagnetite (Fe2.4Ti0.6O4)

Physics

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Scientific paper

Single crystals of approximate composition Fe2.4Ti0.6O4 were prepared from which spherical samples of diameters 1-2 mm were obtained. The measured values of the Königsberger ratio, the ratio of saturation remanence to saturation magnetization and a Lowrie-Fuller test showed that they were multidomain in character. The temperature variation of the coercive force and saturation magnetization was measured between room temperature and the Curie point. The field dependence of intensity of acquired thermoremanent magnetization (TRM) was determined. The predictions of some of the theoretical models for multidomain TRM, which, of necessity, apply to simplifications of real materials (either natural or synthetic), compare favourably with the results of the present study. The validity of the assumptions made in this comparison is discussed.

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