High temperature dielectric properties of PMN-PSN-PZN relaxors

0511956 - FZÚ 2020 RIV DE eng J - Článek v odborném periodiku
Macutkevic, J. - Kamba, Stanislav - Glemza, K. - Banys, J. - Bormanis, K. - Sternberg, A.
High temperature dielectric properties of PMN-PSN-PZN relaxors.
Physica Status Solidi B. Roč. 256, č. 10 (2019), s. 1-5, č. článku 1900050. ISSN 0370-1972. E-ISSN 1521-3951
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR GA18-09265S
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: dielectric permittivity * ferroelectrics * burns temperature * relaxors * polar nanoregions
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 1.481, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1002/pssb.201900050

In this paper, the results of dielectric investigations on four different solid solutions of PbMg1/3Nb2/3O3-PbSc1/2Nb1/2O3-PbZn1/3Nb2/3O3 are presented in a wide temperature range (from room temperature to 1100 K). At higher temperatures (above 600 K) and low frequencies, the electrical conductivity dominates in properties of these ceramics and the Maxwell-Wagner relaxation appears. The value of conductivity activation energy is typical for oxygen vacancies conductivity.Close to the Burns temperature, anomalous behavior of the intrinsic dielectric permittivity is also observed due to the appearance of dielectric relaxation in the terahertz frequency range caused partially by dynamics of polar nanoregions and mainly by overdamped optical soft mode which softens toward T*.

Trvalý link: http://hdl.handle.net/11104/0302190