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Mn K-Edge X-Ray Absorption Spectroscopy (XAS) Studies of La1-xSrxMnO3

Published online by Cambridge University Press:  10 February 2011

S. M. Mini ,
J. F. Mitchells ,
D. G. Hinks ,
Ahmet Alatasi ,
D. Rosenmann ,
C. W. Kimball  and
P. A. Montano
S. M. Mini
Affiliation:
Northern Illinois University, Department of Physics, DeKalb, IL 60115 Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
J. F. Mitchells
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
D. G. Hinks
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
Ahmet Alatasi
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 Illinois Institute of Technology, Chicago, IL
D. Rosenmann
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
C. W. Kimball
Affiliation:
Northern Illinois University, Department of Physics, DeKalb, IL 60115 Materials Science Division, Argonne National Laboratory, Argonne, IL 60439
P. A. Montano
Affiliation:
Materials Science Division, Argonne National Laboratory, Argonne, IL 60439 Dept. of Physics, University of Illinois, Chicago, IL 60680
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Abstract

Systematic Mn K-edge x-ray absorption spectroscopy (XAS) measurements on samples of La1-xSrxMnO3, which are precursors to colossal magnetoresistive (CMR) materials, are reported. Detailed results on the edge or chemical shift as a function of Sr concentration (hole doping) and sample preparation (air vs oxygen annealed), are discussed. For comparison, a systematic XANES study of the Mn K-edge energy shift, denoting valence change in Mn, has been made in standard manganese oxide systems. Contrary to expectations, the variation in near-edge energies for Mn in La0.725Sr0.275MnO3 were small when compared to the difference between that for manganese oxide standards of nominal valence of +3 and +4 (Mn2O3 and MnO2).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 494: Symposium V – Science & Technology of Magnetic Oxides , 1997 , 59
Copyright
Copyright © Materials Research Society 1998

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