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Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy
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SYSNO ASEP 0486080 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Local dynamics and phase transition in quantum paraelectric SrTiO3 studied by Ti K-edge x-ray absorption spectroscopy Author(s) Anspoks, A. (LV)
Timoshenko, J. (LV)
Purans, J. (LV)
Rocca, F. (IT)
Trepakov, Vladimír (FZU-D) RID
Dejneka, Alexandr (FZU-D) RID, ORCID
Itoh, M. (JP)Number of authors 7 Article number 012101 Source Title Journal of Physics Conference Series, 712. - Bristol : IOP Publishing, 2016 - ISSN 1742-6588 Pages s. 1-4 Number of pages 4 s. Publication form Print - P Action International Conference on X-Ray Absorption Fine Structure /19./ - XAFS 2015 Event date 23.08.2015 - 28.08.2015 VEvent location Karlsruhe Country DE - Germany Event type WRD Language eng - English Country GB - United Kingdom Keywords strontium-titanate ; exafs spectroscopy ; low-temperature ; fine-structure ; ferroelectricity ; perovskite ; scattering ; disorder ; spectra Subject RIV BM - Solid Matter Physics ; Magnetism OECD category Condensed matter physics (including formerly solid state physics, supercond.) R&D Projects GAP108/12/1941 GA ČR - Czech Science Foundation (CSF) LO1409 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Institutional support FZU-D - RVO:68378271 UT WOS 000383249000102 EID SCOPUS 84978682908 DOI 10.1088/1742-6596/712/1/012101 Annotation Strontium titanate is a model quantum paraelectric in which, in the region of dominating quantum statistics, the ferroelectric instability is inhibited due to nearly complete compensation of the harmonic contribution into ferroelectric soft mode frequency by the zero-point motion contribution. The enhancement of atomic masses by the substitution of O-16 with O-18 decreases the zero-point atomic motion, and low-T ferroelectricity in (SrTiO3)-O-18 is realized. In this study we report on the local structure of Ti in (SrTiO3)-O-16 and (SrTiO3)-O-18 investigated by Extended X-ray Absorption Fine Structure measurements in the temperature range 6 300 K. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2018
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