mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-94Research ArticleСтатьиExperimental evidences of the shape-induced structural distortion of SrTiO3 single crystals from impurity Mn4+ ions electron paramagnetic resonanceGabbasovB. F.

Kremlevskaya 18, Kazan 420008

GrachevaI. N.

Kremlevskaya 18, Kazan 420008

NikitinS. I.

Kremlevskaya 18, Kazan 420008

ZverevD. G.

Kremlevskaya 18, Kazan 420008

DejnekaA.

v.v.i. Na Slovance 2, 18221 Prague

TrepakovV. A.

v.v.i. Na Slovance 2, 18221 Prague; 194021 St. Petersburg, Russia

YusupovR. V.

Kremlevskaya 18, Kazan 420008

Kazan Federal UniversityRussian FederationInstitute of Physics, ASCRCzech RepublicInstitute of Physics, ASCR; Ioffe Physical-Technical Institute, Russian Academy of SciencesCzech Republic20181809201820218201 (9 pp.)Copyright © Gabbasov B.F., Gracheva I.N., Nikitin S.I., Zverev D.G., Dejneka A., Trepakov V.A., Yusupov R.V., 20242024Gabbasov B.F., Gracheva I.N., Nikitin S.I., Zverev D.G., Dejneka A., Trepakov V.A., Yusupov R.V.Gabbasov B.F., Gracheva I.N., Nikitin S.I., Zverev D.G., Dejneka A., Trepakov V.A., Yusupov R.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/94

A study of high-quality SrTiO3 single crystals doped with the Mn4+ ions in the cubic phase (T > 105 K) with X-band electron paramagnetic resonance reveals direct correspondence between a shape of a sample and magnetic anisotropy of the impurity Mn4+ centers. In particular, for a sample with the shape of a square base rectangular prism, a size of (a × a × h) and faces perpendicular to the <100> crystallographic directions, zero-field splitting parameter D is approximately proportional to (a / h − 1) quantity. Temperature dependence of D indicates that this peculiar symmetry lowering is a feature characteristic for the cubic Fm3m phase of the strontium titanate. Diminishing of the D value with the decrease of the surface roughness for a thin (001)-oriented SrTiO3:Mn platelet shows that the observed effect originates from the sample surface.

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The authors declare that there are no conflicts of interest present.