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X-ray spectroscopy of lanthanum manganites: Nature of doping holes, correlation effects, and orbital ordering

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Abstract

The Mn3s X-ray photoelectron spectra of manganites were studied. It was shown that for the formal valence of manganese from 3+ to 3.3+, the doping holes are O2p in character; as the valence of manganese increases further, the Mn3d states acquire holes. For La0.7Sr0.3MnO3, the Mn3p-3d resonance spectra provided information about the occupied and unoccupied Mn3d states, and the correlation energy U = 6.7 eV was determined experimentally. An analysis of X-ray dichroism on the L absorption spectra of three-dimensional La7/8Sr1/8MnO3 showed that the cooperative Jahn Teller distortion of the orthorhombic phase at 240 K was related to (x 2 − z 2)/(y 2 − z 2) type orbital ordering.

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Division, Russian Academy of Sciences, Ekaterinburg, Russia

    V. R. Galakhov

  2. P. Scherrer Institute, Willigen, Switzerland

    M. C. Falub

  3. Rossendorf Research Center, Dresden, Germany

    K. Kuepper

  4. Osnabruck University, Osnabruck, Germany

    M. Neumann

Authors
  1. V. R. Galakhov
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  2. M. C. Falub
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  3. K. Kuepper
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  4. M. Neumann
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Corresponding author

Correspondence to V. R. Galakhov.

Additional information

Original Russian Text Copyright © 2008 by V. R. Galakhov, M. C. Falub, K. Kuepper, and M. Neumann

__________

Translated from Zhurnal Strukturnoi Khimii, Vol. 49, Supplement, pp. S58–S62, 2008.

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Galakhov, V.R., Falub, M.C., Kuepper, K. et al. X-ray spectroscopy of lanthanum manganites: Nature of doping holes, correlation effects, and orbital ordering. J Struct Chem 49 (Suppl 1), 54–58 (2008). https://doi.org/10.1007/s10947-008-0201-6

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  • DOI: https://doi.org/10.1007/s10947-008-0201-6

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