Open AccessInvestigation of the Spontaneous Spin-Flip Phase Transition in Terbium-yttrium Iron-Garnet by the Magnetooptic Method
Author(s) -
D.R. Djuraev,
L. N. Niyazov,
K. S. Saidov,
B. Yu. Sokolov
Publication year - 2012
Publication title -
ukrainian journal of physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.213
H-Index - 17
eISSN - 2071-0194
pISSN - 2071-0186
DOI - 10.15407/ujpe57.5.531
Subject(s) - condensed matter physics , materials science , magnetization , spontaneous magnetization , yttrium , coercivity , magnetic domain , phase (matter) , phase transition , ferromagnetism , metamagnetism , crystal (programming language) , terbium , yttrium iron garnet , physics , magnetic field , optoelectronics , quantum mechanics , computer science , metallurgy , programming language , oxide , luminescence
The domain structure transformation and the technical magnetization of a Tb0.26Y2.74Fe5O12 single crystal have been studied by the magnetooptic method in the temperature region of a spontaneous spin-flip phase transition (SFPT). It has been found that the SFPT occurs in a finite temperature interval, where the low- and high-temperature magnetic phase domains coexist. We have observed the anomalies of the temperature dependences of the coercive force and the magnetooptic susceptibility of the crystal related to a transformation of its domain structure under the spin-flip. The experimental results obtained are interpreted within the framework of the SFPT theory for a cubic crystal. It has been demonstrated that the existing theory describes consistently theevolution of the Tb0.26Y2.74Fe5O12 garnet domain structure under the spontaneous reorientation of the easy magnetization axis.