Iron affinity for the bixbyite structure type Mössbauer spectroscopy study of (ln1−xFex)2O3 and (Sc1−xFex)xO3
1991; Elsevier BV; Volume: 26; Issue: 6 Linguagem: Inglês
10.1016/0025-5408(91)90185-o
ISSN1873-4227
AutoresR. Gérardin, A. Alebouyeh, Olivier Évrard,
Tópico(s)Magnetic and transport properties of perovskites and related materials
ResumoSolid solutions (In1−xFex)2O3 and (Sc1−xFex)2O3 with the bixbyite type structure are synthetized at 1500°C and studied by X-ray diffraction and 57Fe Mössbauer spectroscopy. The maximum amount of Fe substitution varies as the inverse of the ionic radius of M3+ in the oxide M2O3 (M=Sc,In,Lu) : x=0.6 for Sc2O3, 0.33 for In2O3 and almost zero for Lu2O3. Fe atoms occupy the two cristallographic sites 24d and 8b. The coordinence of these sites does not change with the iron substitution. This can explain the various limits of the iron solubility. A preliminary magnetic study of the iron richest phase (Sc0.4Fe0.6)2O3 has also been performed.
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