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

M. Sikora, O. Mathon, P. van der Linden, J. M. Michalik, J. M. de Teresa, Cz. Kapusta, and S. Pascarelli
Phys. Rev. B 79, 220402(R) – Published 4 June 2009

Abstract

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 ReL2,3 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=10K, 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=250K 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.

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  • Received 27 February 2009

DOI:https://doi.org/10.1103/PhysRevB.79.220402

©2009 American Physical Society

Authors & Affiliations

M. Sikora1,2,*, O. Mathon2, P. van der Linden2, J. M. Michalik1,3, J. M. de Teresa3, Cz. Kapusta1, and S. Pascarelli2

  • 1Department of Solid State Physics, Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, 30-059 Kraków, Poland
  • 2European Synchrotron Radiation Facility, BP 220, 38043 Grenoble Cedex, France
  • 3Departamento de Fisica de la Materia Condensada and Instituto de Ciencia de Materiales de Aragon, Universidad de Zaragoza-CSIC, 50009 Zaragoza, Spain

  • *Corresponding author; marcins@agh.edu.pl

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Issue

Vol. 79, Iss. 22 — 1 June 2009

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