KFU. Card publication. Breaking of the Cubic Symmetry in Millimeter-Size SrTiO3 Crystals: ESR Manifestations

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BREAKING OF THE CUBIC SYMMETRY IN MILLIMETER-SIZE SRTIO3 CRYSTALS: ESR MANIFESTATIONS

Form of presentation

Articles in Russian journals and collections

Year of publication

2023

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Authors, employees of KFU

Nikitin Sergey Ivanovich, author

Bibliographic description in the original language

Gabbasov B.F, Gracheva I.N, Nikitin S.I Breaking of the Cubic Symmetry in Millimeter-Size SrTiO3 Crystals: ESR Manifestations//Crystallography Reports. - 2023. - Vol.68, Is.5. - P.683-694.

Annotation

The found effect of lowering the symmetry of the crystal structure of thin (less than 1 mm) plates and bars of strontium titanate (SrTiO3) single crystals is discussed. This symmetry lowering manifests itself in the electron spin resonance (ESR) spectra of impurity centers (Fe3+ and Mn4+ ions, used as paramagnetic probes). It is shown that symmetry lowering is observed at temperatures T > 105 K, which generally correspond to the cubic phase of SrTiO3; it leads to the formation of a tetragonal nonpolar structure, differing from the antiferrodistortive (AFD) phase D4h18, which is characteristic of strontium titanate at T < 105 K and was not observed previously in SrTiO3. The factors determining the distortion value are found to be the geometry and ratio of sample sizes, surface finishing quality, and crystallographic orientation of plates.

Keywords

SrTiO3, ESR, crystal structure, lowering the symmetry

The name of the journal

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https://repository.kpfu.ru/eng/?p_id=293343&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Nikitin Sergey Ivanovich	ru_RU
dc.date.accessioned	2023-01-01T00:00:00Z	ru_RU
dc.date.available	2023-01-01T00:00:00Z	ru_RU
dc.date.issued	2023	ru_RU
dc.identifier.citation	Gabbasov B.F, Gracheva I.N, Nikitin S.I Breaking of the Cubic Symmetry in Millimeter-Size SrTiO3 Crystals: ESR Manifestations//Crystallography Reports. - 2023. - Vol.68, Is.5. - P.683-694.	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=293343&p_lang=2	ru_RU
dc.description.abstract	��	ru_RU
dc.description.abstract	The found effect of lowering the symmetry of the crystal structure of thin (less than 1 mm) plates and bars of strontium titanate (SrTiO3) single crystals is discussed. This symmetry lowering manifests itself in the electron spin resonance (ESR) spectra of impurity centers (Fe3+ and Mn4+ ions, used as paramagnetic probes). It is shown that symmetry lowering is observed at temperatures T > 105 K, which generally correspond to the cubic phase of SrTiO3; it leads to the formation of a tetragonal nonpolar structure, differing from the antiferrodistortive (AFD) phase D4h18, which is characteristic of strontium titanate at T < 105 K and was not observed previously in SrTiO3. The factors determining the distortion value are found to be the geometry and ratio of sample sizes, surface finishing quality, and crystallographic orientation of plates.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	SrTiO3	ru_RU
dc.subject	ESR	ru_RU
dc.subject	crystal structure	ru_RU
dc.subject	lowering the symmetry	ru_RU
dc.title	Breaking of the Cubic Symmetry in Millimeter-Size SrTiO3 Crystals: ESR Manifestations	ru_RU
dc.type	Articles in Russian journals and collections	ru_RU