Local environment and oxidation state of Mn impurity in SrTiO3 determined from XAFS data

I. A. Sluchinskaya; A. I. Lebedev; A. Erko

doi:10.3103/S1062873810090145

Local environment and oxidation state of Mn impurity in SrTiO3 determined from XAFS data

Materials Science 2015-07-28 v1

Authors: I. A. Sluchinskaya , A. I. Lebedev , A. Erko

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Abstract

The local environment and oxidation state of Mn impurity in strontium titanate doped with 3% Mn were studied by X-ray absorption fine structure spectroscopy. The influence of the preparation conditions on the incorporation of the impurity into the $A$ and $B$ sites was studied. It was established that Mn ions substituting for Ti are in the Mn $^{4+}$ oxidation state and on-center. Mn ions substituting for Sr are in the Mn $^{2+}$ oxidation state, are off-center and displaced from the lattice sites by $\sim$ 0.32 {\AA}. It was demonstrated that studies of the X-ray absorption near-edge structure can be used to determine the concentration ratio of Mn atoms located at the $A$ and $B$ sites.

Keywords

XAFS Mn impurity SrTiO3 oxidation state local environment X-ray absorption near-edge structure

Cite

@article{arxiv.1507.07342,
  title  = {Local environment and oxidation state of Mn impurity in SrTiO3 determined from XAFS data},
  author = {I. A. Sluchinskaya and A. I. Lebedev and A. Erko},
  journal= {arXiv preprint arXiv:1507.07342},
  year   = {2015}
}

Comments

3 pages, 2 figures, 1 table

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