INVESTIGADORES
CANEIRO Alberto
artículos
Título:
Magnetic ordering effects in the Raman spectra of La12xMn12xO3
Autor/es:
E. GRANADO; A. GARCIA; SANJURJO; C. RETTORI; I. TORRIANI; F. PRADO; R.D. SANCHEZ; A. CANEIRO; S. OSEROFF
Revista:
PHYSICAL REVIEW B
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 1999 vol. 60 p. 11879 - 11882
ISSN:
1098-0121
Resumen:
Temperature-dependent Raman spectra of polycrystalline La12xMn12xO3 samples, referred to asLaMnO31d for convenience, were correlated to their structural and magnetic properties for different d . Ford<0.05, a softening of the ;610 cm21 Raman mode is observed below the magnetic ordering temperature.This softening is reduced as d increases from 0.00 to 0.05. This behavior is not associated with latticeanomalies, and is interpreted in terms of a spin-phonon coupling caused by a phonon modulation of thesuperexchange integral. A quantitative analysis of this effect is presented.
