Magnetic orientational phase transition in a biaxially strained single crystal Ho0.6Y2.4Fe5O12

The evolution of the domain structure of a Ho0.6Y2.4Fe5O12 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 〈100〉 and 〈110〉. 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.

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