Magnetism

Magnetic orientational phase transition in a biaxially strained single crystal Ho$_{0.6}$Y$_{2.4}$Fe$_5$O$_{12}$

L. N. Niyazov, B. Yu. Sokolov

National University of Uzbekistan named after M. Ulugbek, Tashkent

Abstract: The evolution of the domain structure of a Ho$_{0.6}$Y$_{2.4}$Fe$_5$O$_{12}$ single crystal under the action of biaxial mechanical stresses was investigated using the magneto-optical method. The investigations were performed on a specimen in the form of a plane-parallel plate that was cut parallel to the (110) crystallographic plane. The mechanical stresses in the specimen were induced by the compressive forces acting on it and oriented in the (110) plane along the directions $\langle$100$\rangle$ and $\langle$110$\rangle$. It was found that, under stresses induced in the specimen, the reorientation of the easy magnetization axis occurs through a first-order phase transition. The obtained results were discussed in terms of the thermodynamic theory of magnetic orientational phase transitions.

Received: 27.10.2011

 English version: Physics of the Solid State, 2012, 54:6, 1176–1181

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