Lead-substituted barium hexaferrite for tunable terahertz optoelectronics

0552562 - FZÚ 2022 RIV JP eng J - Článek v odborném periodiku
Alyabyeva, L. - Prokhorov, A. S. - Vinnik, D.A. - Anzin, V.B. - Ahmed, A.G. - Mikheykin, A. - Bednyakov, Petr - Kadlec, Christelle - Kadlec, Filip - de Prado, Esther - Prokleška, J. - Proschek, P. - Kamba, Stanislav - Pronin, A. V. - Dressel, M. - Abalmasov, V.A. - Dremov, V.V. - Schmid, S. - Savinov, Maxim - Lunkenheimer, P. - Gorshunov, B.P.
Lead-substituted barium hexaferrite for tunable terahertz optoelectronics.
NPG Asia Materials. Roč. 13, č. 1 (2021), č. článku 63. ISSN 1884-4049. E-ISSN 1884-4057
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA21-06802S; GA MŠMT(CZ) LM2018096
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: multiferroics * phonons * dielectric spectroscopy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 10.761, rok: 2021
Způsob publikování: Open access

We performed the first detailed measurements of the temperature-dependent (5-300K) dielectric response of single-crystalline Ba1-xPbxFe12O19 in an extremely broad spectral range of 1 Hz-240 THz. The most important is the observation of a ferroelectric-like terahertz excitation with an unusual temperature behavior of its frequency and strength. We suggest microscopic models that explain the origin of the excitation and its nonstandard temperature evolution. Gigahertz resonances are presumably of magnetoelectric origin.
Trvalý link: http://hdl.handle.net/11104/0327675