Počet záznamů: 1

Terahertz and infrared spectroscopic evidence of phonon-paramagnon coupling in hexagonal piezomagnetic YMnO.sub.3./sub..

  1. 1.
    0368534 - FZU-D 2012 RIV US eng J - Článek v odborném periodiku
    Kadlec, Christelle - Goian, Veronica - Rushchanskii, K.Z. - Kužel, Petr - Ležaič, M. - Kohn, K. - Pisarev, R. V. - Kamba, Stanislav
    Terahertz and infrared spectroscopic evidence of phonon-paramagnon coupling in hexagonal piezomagnetic YMnO3.
    Physical Review. B. Roč. 84, č. 17 (2011), 174120/1-174120/8 ISSN 1098-0121
    Grant CEP: GA ČR GD202/09/H041; GA ČR(CZ) GA202/09/0682
    Grant ostatní: GA UK(CZ) SVV-2011-263303
    Výzkumný záměr: CEZ:AV0Z10100520
    Klíčová slova: magnons * infrared and THz spectroscopy * multiferroics
    Kód oboru RIV: BM - Fyzika pevných látek a magnetismus
    Impakt faktor: 3.691, rok: 2011

    Antiferromagnetic resonance is observed in the spectra of magnetic permeability below the N´eel temperature TN.An additional weak and heavily-damped excitation is seen in the spectra of complex dielectric permittivity within the same frequency range. This excitation contributes to the dielectric spectra in both antiferromagnetic and paramagnetic phases. A detailed analysis of these results and of previously published magnon dispersion branches brought us to the conclusion that the observed absorption bands stem from phonon-phonon and phonon-paramagnon differential absorption processes.
    Trvalý link: http://hdl.handle.net/11104/0202853