TRANSFORMATION OF THE DOMAIN STRUCTURE OF A CUBIC FERRIMAGNETIC MATERIAL AT SPONTANEOUS SPIN FLIP OF THE EASY MAGNETIZATION AXIS

摘要

The magnetooptical method is used to investigate transformation of the domain structure of a cubic Tb_(0.2)Y_(2.8)Fe_5O_(12) ferrimagnetic material at the temperature of spontaneous spin flip phase transition (SFPF). It is demonstrated that the SFPF is observed in a certain temperature interval in which low- and hightemperature magnetic phase domains coexist. It is established that the character of evolution of the domain configuration in the temperature interval of the spin flip depends significantly on the mechanical stresses presented in the crystal. Experimental results are interpreted in the context of the existing SFPF theory for the cubic crystal.