Domain structure in single crystal ferromagnetic oxide films near the phase transitions

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Abstract

The observations of domain structure in single crystal ferromagnetic oxide films near phase transitions induced by temperature and by magnetic field have been carried out. The domain structure has been observed by means of the Faraday effect and by light diffraction. The following phase transition points have been studied in details: paramagnet-ferromagnet transition, Morin transition, compensation point and continuous spin reorientation points. It has been shown that in all considered cases dipolar interactions have significant influence on phase transitions and, in particular, on the magnetization distribution near the phase transition points.

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