Direct evidence for off-centering of Mn impurity in SrTiO3
作者： A. I. Lebedev , I. A. Sluchinskaya , A. Erko , V. F. Kozlovskii
DOI: 10.1134/S0021364009090070
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摘要: Mn-doped SrTiO3 samples (3% Mn) with different deviations from stoichiometry have been investigated using XAFS spectroscopy. It was shown the under various preparation conditions manganese atoms can sub-stitute A and B sites of perovskite structure are in them charge states. Impurity Mn4+ ions that substitute Ti occupy on-center position lattice, whereas Mn2+ Sr off-center displaced lattice by a distance 0.32A.
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