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- Title
The effect of iron doping in La0.8Sr0.2Fe0.05Co0.95O3-d perovskite.
- Authors
Németh, Z.; Klencsár, Z.; Kuzmann, E.; Homonnay, Z.; Vértes, A.; Grenèche, J. M.; Lackner, B.; Kellner, K.; Gritzner, G.; Hakl, J.; Vad, K.; Mészáros, S.; Kerekes, L.
- Abstract
La0.8Sr0.257Fe0.05Co0.95O3-d perovskite is investigated by 57Fe transmission and emission Mössbauer spectroscopy, X-ray diffraction, AC magnetic susceptibility and magnetotransport measurements. Temperature dependence of the 57Fe Mössbauer isomer shift, quadrupole splitting, magnetic hyperfine field, line broadening, and relative spectral area is presented in a detailed manner for La0.8Sr0.257Fe0.05Co0.95O3-d . The oxidation state of iron is determined to be Fe3+, and the presence of preferential electronic charge compensation Fe3+ ? Fe4+ over that of Co3+ ? Co4+ is excluded. Relaxation of iron magnetic moments reflected by the 57Fe Mössbauer spectra of La0.8Sr0.257Fe0.05Co0.95O3-d are interpreted as evidence for the existence of superparamagnetic like Co clusters and a corresponding cluster glass magnetic phase formed below T ˜65 K.
- Subjects
IRON; METALS; PEROVSKITE; OXIDE minerals; LANTHANUM; STRONTIUM; COBALT compounds
- Publication
European Physical Journal B: Condensed Matter, 2005, Vol 43, Issue 3, p297
- ISSN
1434-6028
- Publication type
Article
- DOI
10.1140/epjb/e2005-00057-y