Spin and lattice excitations of multiferroic (Ba.sub.0.2./sub.Sr.sub.0.8./sub.).sub.3./sub.Co.sub.2./sub.Fe.sub.24./sub.O.sub.41./sub. in the THz range

0469445 - FZÚ 2017 RIV US eng C - Konferenční příspěvek (zahraniční konf.)
Kadlec, Filip - Kadlec, Christelle - Buršík, Josef - Vít, Jakub - Goian, Veronica - Prokleška, J. - Kempa, Martin - Borodavka, Fedir - Rols, S. - Kamba, Stanislav
Spin and lattice excitations of multiferroic (Ba_0.2Sr_0.8)₃Co₂Fe₂₄O₄₁ in the THz range.
40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz). New York: IEEE Inc., 2015, s. 1-2, č. článku 7327612. ISBN 978-147998272-1. ISSN 2162-2027.
[40th International Conference on Infrared, Millimeter, and Terahertz waves (IRMMW-THz 2015). Hong Kong (CN), 23.08.2015-28.08.2015]
Grant CEP: GA ČR GA15-08389S
Institucionální podpora: RVO:68378271 ; RVO:61388980
Klíčová slova: magnetoelectric effects * magnetic resonance * hexaferrite * perpendicular magnetic anisotropy
Kód oboru RIV: BM - Fyzika pevných látek a magnetismus; CA - Anorganická chemie (UACH-T)

THz, infrared and inelastic neutron scattering spectra of Z-hexaferrite ceramics were measured in a broad range of temperatures. A sharp electromagnon is observed near 1THz, vanishing with increasing magnetic field until a phase transition occurs at H ≈ 2T. Then, another strong peak whose resonance frequency is linearly proportional to the magnetic field turns up from the sub-THz range. We assign this peak to a ferrimagnetic resonance.

Trvalý link: http://hdl.handle.net/11104/0267252