skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Origin of Robust Ferromagnetism in Eu 0.95Fe 4Sb 12

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{sup +}. 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];  [2];  [2];  [2];  [1];  [1];  [1];  [1];  [1]
  1. ORNL
  2. Argonne National Laboratory (ANL)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); High Flux Isotope Reactor
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931445
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 12
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; FERRIMAGNETISM; FERROMAGNETISM; MAGNETIC CIRCULAR DICHROISM; TRANSITION TEMPERATURE; EUROPIUM ALLOYS; IRON ALLOYS; ANTIMONY ALLOYS

Citation Formats

Vemuru, Krishnamurthy V, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, Lee, Sales, Brian C, Mandrus, David, Singh, David J, and Bilc, Daniel I. Origin of Robust Ferromagnetism in Eu0.95Fe4Sb12. United States: N. p., 2007. Web.
Vemuru, Krishnamurthy V, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, Lee, Sales, Brian C, Mandrus, David, Singh, David J, & Bilc, Daniel I. Origin of Robust Ferromagnetism in Eu0.95Fe4Sb12. United States.
Vemuru, Krishnamurthy V, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, Lee, Sales, Brian C, Mandrus, David, Singh, David J, and Bilc, Daniel I. Mon . "Origin of Robust Ferromagnetism in Eu0.95Fe4Sb12". United States. doi:.
@article{osti_931445,
title = {Origin of Robust Ferromagnetism in Eu0.95Fe4Sb12},
author = {Vemuru, Krishnamurthy V and Lang, J. C. and Haskel, D. and Keavney, D. J. and Srajer, G. and Robertson, Lee and Sales, Brian C and Mandrus, David and Singh, David J and Bilc, Daniel I},
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{sup +}. 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 = {},
journal = {Physical Review Letters},
number = 12,
volume = 98,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}