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Title: Ferrimagnetism in EuFe4Sb12 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-2,L-3 edges, at Eu M-4,M-5 edges, x-ray absorption spectroscopy (XAS) investigation of Eu valence, and local spin density calculations, to show that the filled skutterudite Eu0.95Fe4Sb12 is a ferrimagnet in which the Fe 3d moment and the Eu2+ 4f moment are magnetically ordered with dominant antiferromagnetic coupling. From Eu L-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-C of 85 K in Eu0.95Fe4Sb12 to f-electron interaction with the nearly ferromagnetic [Fe4Sb12](2.2-) host lattice.

Authors:
 [1];  [2];  [2];  [2];  [2];  [3];  [4];  [4];  [4];  [4]
  1. Oak Ridge National Laboratory (ORNL)
  2. Argonne National Laboratory (ANL)
  3. unknown
  4. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
931905
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; ANTIMONY ALLOYS; EUROPIUM ALLOYS; IRON ALLOYS; VALENCE; TRANSITION TEMPERATURE

Citation Formats

Krishnamurthy, Vemuru, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, J. L., Sales, Brian C, Mandrus, David, Singh, David J, and Bilc, Daniel I. Ferrimagnetism in EuFe4Sb12 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, Vemuru, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, J. L., Sales, Brian C, Mandrus, David, Singh, David J, & Bilc, Daniel I. Ferrimagnetism in EuFe4Sb12 due to the interplay of f-electron moments and a nearly ferromagnetic host. United States. doi:10.1103/PhysRevLett.98.126403.
Krishnamurthy, Vemuru, Lang, J. C., Haskel, D., Keavney, D. J., Srajer, G., Robertson, J. L., Sales, Brian C, Mandrus, David, Singh, David J, and Bilc, Daniel I. Thu . "Ferrimagnetism in EuFe4Sb12 due to the interplay of f-electron moments and a nearly ferromagnetic host". United States. doi:10.1103/PhysRevLett.98.126403.
@article{osti_931905,
title = {Ferrimagnetism in EuFe4Sb12 due to the interplay of f-electron moments and a nearly ferromagnetic host},
author = {Krishnamurthy, Vemuru and Lang, J. C. and Haskel, D. and Keavney, D. J. and Srajer, G. and Robertson, J. L. 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-2,L-3 edges, at Eu M-4,M-5 edges, x-ray absorption spectroscopy (XAS) investigation of Eu valence, and local spin density calculations, to show that the filled skutterudite Eu0.95Fe4Sb12 is a ferrimagnet in which the Fe 3d moment and the Eu2+ 4f moment are magnetically ordered with dominant antiferromagnetic coupling. From Eu L-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-C of 85 K in Eu0.95Fe4Sb12 to f-electron interaction with the nearly ferromagnetic [Fe4Sb12](2.2-) host lattice.},
doi = {10.1103/PhysRevLett.98.126403},
journal = {Physical Review Letters},
number = 12,
volume = 98,
place = {United States},
year = {Thu Mar 01 00:00:00 EST 2007},
month = {Thu Mar 01 00:00:00 EST 2007}
}