INVESTIGADORES
MASSA Nestor Emilio
artículos
Título:
Infrared absorption and reflectivity of double perovskite Sr2FeWO6
Autor/es:
FERNANDO P. DE LA CRUZ; NESTOR E. MASSA; JOSE ANTONIO ALONSO; MARıA JESUS MARTıNEZ-LOPE; MARıA TERESA CASAIS
Revista:
SOLID STATE COMMUNICATIONS
Editorial:
PERGAMON-ELSEVIER SCIENCE LTD
Referencias:
Lugar: Amsterdam; Año: 2003 vol. 127 p. 703 - 706
ISSN:
0038-1098
Resumen:
In this work we present temperature dependent infrared reflectivity and absorption of Sr2FeWO6 between 700 and 17 K measured from 40 to 10000 cm21. The reflectivity spectra show well defined phonon bands peaking at 143, 227, 377 and 625 cm21 assigned to overlapping vibrational modes split from those active in cubic perovskite. We have also verified that this compound is structurally stable in the whole temperature range and that its optical gap at ,750 cm21 (95 meV) undergoes only a minor high temperature decrease ascribed to new thermally accessible levels.
