This article is cited in 4 papers

Magnetism

Magneto-optical investigations of the domain structure and magnetization of the ferrite-garnet Tb$_{0.2}$Y$_{2.8}$Fe$_5$O$_{12}$ in the temperature range of the spontaneous spin-reorientation phase transition

B. Yu. Sokolov

National University of Uzbekistan named after M. Ulugbek, Tashkent

Abstract: The transformation of a domain structure and technical magnetization of the Tb$_{0.2}$Y$_{2.8}$Fe$_5$O$_{12}$ single crystal in the temperature range of the spontaneous orientational phase transition have been investigated by the magneto-optical method. It has been shown that the phase transition is extended in a certain temperature range in which domains of the low-temperature and high-temperature magnetic phases coexist. It has been found that the evolution of the domain configuration in the temperature range of spin reorientation substantially depends on the presence of mechanical stresses in the crystal. Anomalies in the temperature dependences of the coercivity and magneto-optical susceptibility of the crystal due to the transformation of its domain structure during the phase transition have been revealed. The experimental results have been interpreted within the existing theory of orientational phase transitions in cubic crystals.

Received: 14.12.2010

 English version: Physics of the Solid State, 2011, 53:8, 1581–1587

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