Structural transition in lanthanum gallate and transformation of the fine structure of the EPR spectrum of a Gd3+ impurity center
Authors: Vazhenin, V.; Guseva, V.; Fokin, A.; Potapov, A.; Artyomov, M.
Source: Physics of the Solid State, Volume 53, Number 4, April 2011 , pp. 773-778(6)
Publisher: MAIK Nauka/Interperiodica
Abstract:Abrupt changes in resonance positions, hysteretic temperature behavior, and coexistence of phases, which indicate a first-order phase transition, have been revealed from measurements of temperature dependences of the EPR spectra of Gd3+ and Mn4+ centers in the vicinity of the structural transition of lanthanum gallate. The transformation of monoclinic Gd3+ centers into trigonal Gd3+ centers upon the phase transition has been used to estimate the adequacy of two approximations of the superposition model for parameters of the zero-field splitting of the ground state.
Document Type: Research Article
Affiliations: Email: firstname.lastname@example.org
Publication date: April 2011