Search for nonlinear THz absorption by electromagnons in multiferroic hexaferrites

0561853 - FZÚ 2023 RIV JP eng J - Článek v odborném periodiku
Vít, Jakub - Repček, Dalibor - Kadlec, Christelle - Kadlec, Filip - Adhlakha, N. - Di Pietro, P. - Piccirilli, F. - Kovalev, S. - Deinert, J.-C. - Ilyakov, I. - Awari, N. - Chen, M. - Buršík, Josef - Park, C.B. - Kim, K. H. - Gensch, M. - Perucchi, A. - Kamba, Stanislav
Search for nonlinear THz absorption by electromagnons in multiferroic hexaferrites.
Journal of the Physical Society of Japan. Roč. 91, č. 10 (2022), č. článku 104703. ISSN 0031-9015
Grant CEP: GA ČR(CZ) GA21-06802S; GA MŠMT(CZ) EF16_019/0000760
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271 ; RVO:61388980
Klíčová slova: multiferroics * hexaferrite * electromagnon * THz spectroscopy
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.); Inorganic and nuclear chemistry (UACH-T)
Impakt faktor: 1.7, rok: 2022
Způsob publikování: Omezený přístup
https://doi.org/10.7566/JPSJ.91.104703

Complex frustrated magnetic structures in multiferroic hexaferrites are well tunable by temperature, magnetic field and doping. We investigated the influence of strong THz pulses generated by superradiant THz sources on magnetic structure and related electromagnons’ absorption in Y- and Z-hexaferrites. While in Z-hexaferrite (Ba0.2Sr0.8)3Co2Fe24O41 polycrystal, the observed changes in transmission spectra were fully described by sample heating, a blue-shift of the electromagnon frequency observed in Y-hexaferrite Ba0.2Sr1.8Co2(Fe0.96Al0.04)12O22 single-crystal could be possibly ascribed to the transition from the alternating longitudinal conical to the transverse conical magnetic structure. We elaborated a nonlinear model which explained absence of nonlinearity in Z-hexaferrite (Ba0.2Sr0.8)3Co2Fe24O41. For Y-hexaferrite Ba0.2Sr1.8Co2(Fe0.96Al0.04)12O22, we discuss possible transient or even permanent effects of both THz electric and magnetic fields on its magnetic structure.
Trvalý link: https://hdl.handle.net/11104/0336339