Electronic Structure Changes across the Metamagnetic Transition in FeRh via Hard X-Ray Photoemission

A. X. Gray, D. W. Cooke, P. Krüger, C. Bordel, A. M. Kaiser, S. Moyerman, E. E. Fullerton, S. Ueda, Y. Yamashita, A. Gloskovskii, C. M. Schneider, W. Drube, K. Kobayashi, F. Hellman, and C. S. Fadley
Phys. Rev. Lett. 108, 257208 – Published 21 June 2012
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Abstract

Stoichiometric FeRh undergoes a temperature-induced antiferromagnetic (AFM) to ferromagnetic (FM) transition at 350K. In this Letter, changes in the electronic structure accompanying this transition are investigated in epitaxial FeRh thin films via bulk-sensitive valence-band and core-level hard x-ray photoelectron spectroscopy with a photon energy of 5.95 keV. Clear differences between the AFM and FM states are observed across the entire valence-band spectrum and these are well reproduced using density-functional theory. Changes in the 2p core levels of Fe are also observed and interpreted using Anderson impurity model calculations. These results indicate that significant electronic structure changes over the entire valence-band region are involved in this AFM-FM transition.

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  • Received 28 September 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.257208

© 2012 American Physical Society

Authors & Affiliations

A. X. Gray1,2,3, D. W. Cooke4, P. Krüger5, C. Bordel4,6, A. M. Kaiser2,3,7, S. Moyerman8, E. E. Fullerton8, S. Ueda9, Y. Yamashita9, A. Gloskovskii10, C. M. Schneider7, W. Drube10, K. Kobayashi9, F. Hellman3,4, and C. S. Fadley2,3

  • 1Stanford Institute for Materials and Energy Science, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94029, USA
  • 2Department of Physics, University of California, Davis, Davis, California 95616, USA
  • 3Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
  • 4Department of Physics, University of California, Berkeley, Berkeley, California 94720, USA
  • 5ICB, UMR 5209, CNRS—Université de Bourgogne, BP 47870, 21078 Dijon Cedex, France
  • 6GPM, UMR CNRS 6634, Université de Rouen, Avenue de l’Université—BP12, 76801 St Etienne du Rouvray, France
  • 7Peter-Grünberg-Institut PGI-6, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany
  • 8Center for Magnetic Recording Research, University of California, San Diego, La Jolla, California 92093
  • 9NIMS Beamline Station at SPring-8, National Institute for Materials Science, Sayo, Hyogo 679-5148, Japan
  • 10DESY Photon Science, Deutsches Elektronen-Synchrotron, 22603 Hamburg, Germany

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Issue

Vol. 108, Iss. 25 — 22 June 2012

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