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

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 Å. 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.

3 pages, 2 figures, 1 table

References in corpus (1)

• Electron spin resonance investigation of Mn^{2+} ions and their dynamics in manganese doped SrTiO_3

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