A. I. Lebedev, I. A. Sluchinskaya, A. Erko, V. F. Kozlovskii, “Direct evidence for off-centering of Mn impurity in SrTiO$_3$”, Pis'ma v Zh. Èksper. Teoret. Fiz., 2009, Volume 89, Issue 9,Pages <nobr>545

This article is cited in 28 papers

CONDENSED MATTER

Direct evidence for off-centering of Mn impurity in SrTiO$_3$

A. I. Lebedev^a, I. A. Sluchinskaya^a, A. Erko^b, V. F. Kozlovskii^c

^a M. V. Lomonosov Moscow State University, Faculty of Physics
^b BESSY GmbH, 12489 Berlin, Germany
^c M. V. Lomonosov Moscow State University, Department of Chemistry

Abstract: 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 the perovskite structure and are in them in different charge states. Impurity Mn⁴⁺ ions that substitute Ti sites occupy on-center position in the lattice, whereas Mn²⁺ ions that substitute Sr sites are off-center and are displaced from the lattice sites by a distance of 0.32Å.

PACS: 61.10.Ht, 61.72.-y, 77.84.Dy

Received: 18.03.2009