INVESTIGADORES
RODRIGUEZ TORRES Claudia Elena
artículos
Título:
Low temperature magnetic ordering in Fe-doped TiO2 samples
Autor/es:
V. BILOVOL; A.M. MUDARRA NAVARRO; W.T.HERRERA; D.R.SÁNCHEZ; E.M.BAGGIO-SAITOVICH; C.E. RODRÍGUEZ TORRES; F.H. SÁNCHEZ; A.F. CABRERA
Revista:
HYPERFINE INTERACTIONS
Editorial:
Springer Netherlands
Referencias:
Año: 2009 vol. 195 p. 155 - 159
ISSN:
0304-3843
Resumen:
Fe-doped TiO2 samples with different Fe content prepared by mechanical alloying have been investigated by means of Mössbauer spectroscopy at 300 and 4.2 K. The results indicate the coexistence of Fe2+ and Fe3+ ions in paramagnetic states at room temperatures in the rutile structure. All samples present magnetic order at 4.3 K. When the Fe concentration increases the Fe ions in the rutile matrix became closer giving the possibility of strong magnetic interactions between them. The temperature evolution of the magnetic order was followed for the 15 at.% of Fesample. The Fe-doped oxide formed for this composition orders below 20 K reachingan almost totally magnetic ordered state at 4.3 K.
