Abstract:
A comparative study of the lattice dynamic upon phase transitions in a polycrystalline Ba$_{0.8}$Sr$_{0.2}$TiO$_{3}$ (BST) film on a Pt substrate and in epitaxial BST films grown on various sections of an MgO substrate has been performed by Raman spectroscopy. It has been found that different sequences of phase transitions take place in these films. The BST/Pt films demonstrate the same sequence of phase transitions that is observed in the bulk ceramics. The hardening of a soft mode in BST/(001)MgO and BST/Pt films shows that the transition from the tetragonal ferroelectric phase to the paraelectric phase has features of the displacement-type phase transition and also the order–disorder phase transition. When approaching the ferroelectric transition temperature, the soft mode in the BST/(111)MgO film is softened, following the Cockran law, which indicates the displacement-type phase transition.
Citation:
A. S. Anokhin, A. G. Razumnaya, Yu. I. Yuzyuk, Yu. I. Golovko, V. M. Mukhortov, “Phase transitions in barium–strontium titanate films on MgO substrates with various orientations”, Fizika Tverdogo Tela, 58:10 (2016), 1956–1963; Phys. Solid State, 58:10 (2016), 2027–2034
\Bibitem{AnoRazYuz16}
\by A.~S.~Anokhin, A.~G.~Razumnaya, Yu.~I.~Yuzyuk, Yu.~I.~Golovko, V.~M.~Mukhortov
\paper Phase transitions in barium–strontium titanate films on MgO substrates with various orientations
\jour Fizika Tverdogo Tela
\yr 2016
\vol 58
\issue 10
\pages 1956--1963
\mathnet{http://mi.mathnet.ru/ftt9819}
\elib{https://elibrary.ru/item.asp?id=27368780}
\transl
\jour Phys. Solid State
\yr 2016
\vol 58
\issue 10
\pages 2027--2034
\crossref{https://doi.org/10.1134/S1063783416100048}
Linking options:
https://www.mathnet.ru/eng/ftt9819
https://www.mathnet.ru/eng/ftt/v58/i10/p1956
This publication is cited in the following 10 articles:
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V. B. Shirokov, A. G. Razumnaya, “Soft modes behavior in bilayer (Ba,Sr)TiO3/(Ba,Sr)TiO3 heterostructures”, Ferroelectrics, 567:1 (2020), 102
V. R. Bilyk, E. D. Mishina, A. V. Ovchinnikov, M. B. Agranat, “Ultrafast modulation of ferroelectric polarization in a $\rm Ba_{0.8}\rm Sr_{0.2}\rm TiO_3$ film with an intensive subperiodic terahertz pulse”, High Temperature, 58:6 (2020), 942–944
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Dmitrii P. Pavlov, Rustem R. Zagidullin, Vladimir M. Mukhortov, Viktor V. Kabanov, Tadashi Adachi, Takayuki Kawamata, Yoji Koike, Rinat F. Mamin, “Fabrication of High-Temperature Quasi-Two-Dimensional Superconductors at the Interface of a Ferroelectric
Ba0.8Sr0.2TiO3
Film and an Insulating Parent Compound of
La2CuO4”, Phys. Rev. Lett., 122:23 (2019)
E. D. Gor'kovaya, Yu. A. Tikhonov, V. I. Torgashev, A. S. Mikheykin, I. A. Lukyanchuk, D. Mezzane, N. Ortega, A. Kumar, R. S. Katiyar, A. G. Razumnaya, “Properties of the low-frequency phonon spectra of ferroelectric barium titanate-based heterostructures”, Ferroelectrics, 543:1 (2019), 36
K. A. Grishunin, N. A. Ilyin, N. E. Sherstyuk, E. D. Mishina, A. Kimel, V. M. Mukhortov, A. V. Ovchinnikov, O. V. Chefonov, M. B. Agranat, 2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017, 2841
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D.V. Stryukov, A.G. Razumnaya, Yu I. Golovko, A.S. Anokhin, I.A. Lukyanchuk, V.B. Shirokov, V.M. Mukhortov, “Lattice dynamics and structural distortions in the multiferroic (Ba,Sr)TiO3/(Bi,Nd)FeO3 heterostructures”, Thin Solid Films, 636 (2017), 220