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Title: Ferrimagnetism in EuFe{sub 4}Sb{sub 12} due to the Interplay of f-Electron Moments and a Nearly Ferromagnetic Host

Abstract

We combine x-ray magnetic circular dichroism spectroscopy at Fe L{sub 2,3} edges, at Eu M{sub 4,5} edges, x-ray absorption spectroscopy (XAS) investigation of Eu valence, and local spin density calculations, to show that the filled skutterudite Eu{sub 0.95}Fe{sub 4}Sb{sub 12} is a ferrimagnet in which the Fe 3d moment and the Eu{sup 2+} 4f moment are magnetically ordered with dominant antiferromagnetic coupling. From Eu L{sub 3} edge XAS, we find that about 13% of the Eu have a formal valence of 3+. We ascribe the origin of ferrimagnetism at a relatively high transition temperature T{sub C} of 85 K in Eu{sub 0.95}Fe{sub 4}Sb{sub 12} to f-electron interaction with the nearly ferromagnetic [Fe{sub 4}Sb{sub 12}]{sup 2.2-} host lattice.

Authors:
; ; ; ;  [1]; ; ; ;  [2];  [1];  [3]
  1. Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
  2. Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  3. (United States)
Publication Date:
OSTI Identifier:
20951130
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 12; Other Information: DOI: 10.1103/PhysRevLett.98.126403; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ABSORPTION SPECTROSCOPY; ANTIFERROMAGNETISM; ANTIMONIDES; ELECTRONS; EUROPIUM COMPOUNDS; EUROPIUM IONS; FERRIMAGNETISM; IRON COMPOUNDS; MAGNETIC CIRCULAR DICHROISM; SPIN; TRANSITION TEMPERATURE; X RADIATION; X-RAY SPECTROSCOPY

Citation Formats

Krishnamurthy, V. V., Robertson, J. L., Sales, B. C., Mandrus, D. G., Singh, D. J., Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Bilc, D. I., and Department of Physics, University of Tennessee, Knoxville, Tennessee 37996. Ferrimagnetism in EuFe{sub 4}Sb{sub 12} due to the Interplay of f-Electron Moments and a Nearly Ferromagnetic Host. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.126403.
Krishnamurthy, V. V., Robertson, J. L., Sales, B. C., Mandrus, D. G., Singh, D. J., Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Bilc, D. I., & Department of Physics, University of Tennessee, Knoxville, Tennessee 37996. Ferrimagnetism in EuFe{sub 4}Sb{sub 12} due to the Interplay of f-Electron Moments and a Nearly Ferromagnetic Host. United States. doi:10.1103/PHYSREVLETT.98.126403.
Krishnamurthy, V. V., Robertson, J. L., Sales, B. C., Mandrus, D. G., Singh, D. J., Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Bilc, D. I., and Department of Physics, University of Tennessee, Knoxville, Tennessee 37996. Fri . "Ferrimagnetism in EuFe{sub 4}Sb{sub 12} due to the Interplay of f-Electron Moments and a Nearly Ferromagnetic Host". United States. doi:10.1103/PHYSREVLETT.98.126403.
@article{osti_20951130,
title = {Ferrimagnetism in EuFe{sub 4}Sb{sub 12} due to the Interplay of f-Electron Moments and a Nearly Ferromagnetic Host},
author = {Krishnamurthy, V. V. and Robertson, J. L. and Sales, B. C. and Mandrus, D. G. and Singh, D. J. and Lang, J. C. and Haskel, D. and Keavney, D. J. and Srajer, G. and Bilc, D. I. and Department of Physics, University of Tennessee, Knoxville, Tennessee 37996},
abstractNote = {We combine x-ray magnetic circular dichroism spectroscopy at Fe L{sub 2,3} edges, at Eu M{sub 4,5} edges, x-ray absorption spectroscopy (XAS) investigation of Eu valence, and local spin density calculations, to show that the filled skutterudite Eu{sub 0.95}Fe{sub 4}Sb{sub 12} is a ferrimagnet in which the Fe 3d moment and the Eu{sup 2+} 4f moment are magnetically ordered with dominant antiferromagnetic coupling. From Eu L{sub 3} edge XAS, we find that about 13% of the Eu have a formal valence of 3+. We ascribe the origin of ferrimagnetism at a relatively high transition temperature T{sub C} of 85 K in Eu{sub 0.95}Fe{sub 4}Sb{sub 12} to f-electron interaction with the nearly ferromagnetic [Fe{sub 4}Sb{sub 12}]{sup 2.2-} host lattice.},
doi = {10.1103/PHYSREVLETT.98.126403},
journal = {Physical Review Letters},
number = 12,
volume = 98,
place = {United States},
year = {Fri Mar 23 00:00:00 EDT 2007},
month = {Fri Mar 23 00:00:00 EDT 2007}
}