Extrinsic permittivity in domain engineered rhombohedral BaTiO.sub.3./sub. monocrystal

0493424 - FZÚ 2019 RIV US eng J - Článek v odborném periodiku
Bednyakov, Petr - Savinov, Maxim - Pokorný, Jan - Hlinka, Jiří
Extrinsic permittivity in domain engineered rhombohedral BaTiO₃ monocrystal.
Journal of Applied Physics. Roč. 124, č. 2 (2018), s. 1-4, č. článku 024101. ISSN 0021-8979. E-ISSN 1089-7550
Grant CEP: GA ČR GA15-04121S; GA MŠMT EF16_019/0000760
GRANT EU: European Commission CZ.02.1.01/0.0/0.0/16_019/0000760 - SOLID21
Institucionální podpora: RVO:68378271
Klíčová slova: domain walls * BaTiO₃ * ferroelectrics * polarizing microscopy * extrinsic contribution * dielectric permittivity * domain engineering
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 2.328, rok: 2018

Arrangement of 90-degree domain walls in the domain structure of the 111 (pc)-oriented single crystal plates of BaTiO3 was intentionally modified by combinations of in-plane and out-of-plane steady state electric poling at ambient temperature. It is shown that the annealed, in-plane, and out-of-plane poled samples exhibit markedly different dielectric properties at low temperatures. The difference in low-temperature permittivity behavior is enhanced by the out-of-plane fast-decayed bipolar electric pulse treatment, but the efficiency of this enhancement is strongly dependent on the initial domain structure. The absence of a clear signature of the pulse treatment in optical observations of the domain structure suggests that it might involve mostly changes in the 180-degree domain wall subsystem.
Trvalý link: http://hdl.handle.net/11104/0286793