Field-induced magnetostructural phase transition in double perovskite Ca2FeReO6 studied via x-ray magnetic circular dichroism

作     者：M. Sikora O. Mathon P. van der Linden J. M. Michalik J. M. de Teresa Cz. Kapusta S. Pascarelli 

作者机构：Department of Solid State Physics Faculty of Physics and Applied Computer Science AGH University of Science and Technology 30-059 Kraków Poland European Synchrotron Radiation Facility BP 220 38043 Grenoble Cedex France Departamento de Fisica de la Materia Condensada and Instituto de Ciencia de Materiales de Aragon Universidad de Zaragoza-CSIC 50009 Zaragoza Spain 

出 版 物：《Physical Review B》 (物理学评论B辑：凝聚态物质与材料物理学)

年 卷 期：2009年第79卷第22期

页      面：220402(R)-220402(R)页

核心收录：

学科分类：07[理学] 0702[理学-物理学] 

主　　题：calcium compounds iron compounds magnetic circular dichroism magnetic moments magnetic transitions magnetisation spin-orbit interactions 

摘      要：Spin and orbital contributions to the magnetic moment of rhenium have been studied across the magnetostructural transition in Ca2FeReO6 double perovskite employing x-ray magnetic circular dichroism (XMCD) at the Re L2,3 edges. Temperature-dependent measurements performed in pulsed magnetic field varying from 6.8 to 30 T revealed that the two phases of this compound are characterized by a different spin-orbit coupling. At T=10 K, the average orbital-to-spin moment ratio of the Re sublattice increases in the application of 30 T magnetic field by ∼5%, while at T=250 K it is field independent and amounts to |mL/mS|=0.362(6). The field and temperature dependences of the rhenium XMCD and bulk magnetization are explained within the scenario of a field-induced phase coexistence and transition between two monoclinic phases of diverse magnetocrystalline coupling.