TY  - JOUR
AU  - Anspoks, A.
AU  - Bocharov, D.
AU  - Purans, J.
AU  - Rocca, F.
AU  - Sarakovskis, A.
AU  - Trepakov, V.
AU  - Dejneka, A.
AU  - Itoh, M.
TI  - Local structure studies of SrTi<sup>16</sup>O<sub>3</sub> and SrTi<sup>18</sup>O<sub>3</sub>
JO  - Physica scripta
VL  - 89
IS  - 4
SN  - 0031-8949
CY  - Bristol
PB  - IoP Publ.
M1  - PUBDB-2015-05195
SP  - 044002 
PY  - 2014
N1  - (c) The Royal Swedish Academy of Sciences
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000333449400003
DO  - DOI:10.1088/0031-8949/89/04/044002
UR  - https://bib-pubdb1.desy.de/record/288954
ER  -