%0 Journal Article
%A Anspoks, A.
%A Bocharov, D.
%A Purans, J.
%A Rocca, F.
%A Sarakovskis, A.
%A Trepakov, V.
%A Dejneka, A.
%A Itoh, M.
%T Local structure studies of SrTi<sup>16</sup>O<sub>3</sub> and SrTi<sup>18</sup>O<sub>3</sub>
%J Physica scripta
%V 89
%N 4
%@ 0031-8949
%C Bristol
%I IoP Publ.
%M PUBDB-2015-05195
%P 044002 
%D 2014
%Z (c) The Royal Swedish Academy of Sciences
%X In this work we report on the local structure of Ti in SrTi<sup>16</sup>O<sub>3</sub> (STO16) and SrTi<sup>18</sup>O<sub>3</sub> (STO18) investigated in the low temperature range (6–300 K) by extended x-ray absorption fine structure and x-ray absorption near edge structure (XANES) spectroscopy at Ti K-edge and by optical second harmonic generation (SHG). By comparing XANES of STO16 and STO18 we have identified the isotopic effect which produces at T < 100K a noticeable difference in the measured mean square relative displacements (MSRD) of Ti–O1 bonds: while STO16 follow the expected Einstein-like behavior, for STO18 we have measured an increase of MSRD values with decreasing temperature. This is an indication of an increasing off-center position of the Ti atoms in the TiO<sub>6</sub> octahedra.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000333449400003
%R 10.1088/0031-8949/89/04/044002
%U https://bib-pubdb1.desy.de/record/288954