6533b7d6fe1ef96bd126652a
RESEARCH PRODUCT
Local structure studies of SrTi16O3and SrTi18O3
Alexandr DejnekaF. RoccaDmitry BocharovAndris AnspoksMitsuru ItohAnatolijs SarakovskisJuris PuransV. A. Trepakovsubject
X-ray spectroscopyMaterials scienceAbsorption spectroscopyOctahedronAnalytical chemistrySecond-harmonic generationAtmospheric temperature rangeCondensed Matter PhysicsSpectroscopyAbsorption (electromagnetic radiation)Mathematical PhysicsAtomic and Molecular Physics and OpticsXANESdescription
In this work we report on the local structure of Ti in SrTi 16 O3 (STO16) and SrTi 18 O3 (STO18) investigated in the low temperature range (6‐300K) 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 TiO6 octahedra.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-02-25 | Physica Scripta |