Electromagnon in the Z-type hexaferrite (Ba.sub.x./sub.Sr.sub.1-x./sub.).sub.3./sub.Co.sub.2./sub.Fe.sub.24./sub.O.sub.41./sub.

0462658 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Kadlec, Filip - Kadlec, Christelle - Vít, Jakub - Borodavka, Fedir - Kempa, Martin - Prokleška, J. - Buršík, Josef - Uhrecký, Róbert - Rols, S. - Chai, Y.S. - Zhai, K. - Sun, Y. - Drahokoupil, Jan - Goian, Veronica - Kamba, Stanislav
Electromagnon in the Z-type hexaferrite (Ba_xSr_1-x)₃Co₂Fe₂₄O₄₁.
Physical Review. B. Roč. 94, č. 2 (2016), 1-8, č. článku 024419. ISSN 1098-0121
Grant CEP: GA MŠMT(CZ) LD15014; GA ČR GA15-08389S; GA ČR(CZ) GA14-18392S
Institucionální podpora: RVO:68378271 ; RVO:61388980
Klíčová slova: electromagnon * THz spectroscopy * multiferroics
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus; CA - Anorganická chemie (UACH-T)
Impakt faktor: 3.736, rok: 2014

We studied experimentally the high-temperature magnetoelectric (BaxSr1-x)3Co2Fe24O41 prepared as ceramics a single crystal using inelastic neutron scattering. THz time-domain, Raman, and far-infrared spectroscopies. We observed an electromagnon active in EwIIz polarized spectra. On heating from 7 to 250 K, the frequency of this electromagnon drops from 36 to 25 cm-1 and its damping gradually increases. Applying external magnetic field has a similar effect on the damping and frequency of the electromagnon, and the mode is no longer observable in the THz spectra above 2 T, as the transverse-conical magnetic strucrure transforms into a collinear one.
Trvalý link: http://hdl.handle.net/11104/0262048