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

  • S. M. Mini (a1) (a2), J. F. Mitchells (a2), D. G. Hinks (a2), Ahmet Alatasi (a2) (a3), D. Rosenmann (a2), C. W. Kimball (a1) (a2) and P. A. Montano (a2) (a4)...

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).

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

  • S. M. Mini (a1) (a2), J. F. Mitchells (a2), D. G. Hinks (a2), Ahmet Alatasi (a2) (a3), D. Rosenmann (a2), C. W. Kimball (a1) (a2) and P. A. Montano (a2) (a4)...

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