Spin-phonon coupling in multiferroic YbMnO(3) studied by Raman scattering.
J Phys Condens Matter
; 21(6): 064218, 2009 Feb 11.
Article
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| MEDLINE
| ID: mdl-21715920
ABSTRACT
Hexagonal YbMnO(3) bulk polycrystals were prepared and studied by Raman scattering in the temperature range of 15-300 K. A total of 15 phonon modes of A(1), E(1) and E(2) type were identified. Some E(2) phonon modes showed anomalous temperature variations in frequency at T(N)â¼80 K, suggesting a coupling between the spin and phonon systems below T(N). As another evidence of spin-phonon coupling, softening of an A(1)-phonon mode for the O-Mn vibration was observed at â¼T(N). Substitution of Mn by Al suggests this view.
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Bases de datos:
MEDLINE
Idioma:
En
Revista:
J Phys Condens Matter
Asunto de la revista:
BIOFISICA
Año:
2009
Tipo del documento:
Article
País de afiliación:
Japón