Lead-substituted barium hexaferrite for tunable terahertz optoelectronics

0552562 - FZÚ 2022 RIV JP eng J - Journal Article
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
R&D Projects: GA MŠMT(CZ) EF16_019/0000760; GA ČR(CZ) GA21-06802S; GA MŠMT(CZ) LM2018096
Grant - others:OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institutional support: RVO:68378271
Keywords : multiferroics * phonons * dielectric spectroscopy
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 10.761, year: 2021
Method of publishing: 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.
Permanent Link: http://hdl.handle.net/11104/0327675