The effect of iron doping in La0.8Sr0.2Fe0.05Co0.95O3-δ perovskite

被引：0
作者：
Z. Németh
Z. Klencsár
E. Kuzmann
Z. Homonnay
A. Vértes
J. M. Grenèche
B. Lackner
K. Kellner
G. Gritzner
J. Hakl
K. Vad
S. Mészáros
L. Kerekes
机构：
[1] Eötvös Loránd University,Department of Nuclear Chemistry
[2] Research Group for Nuclear Methods in Structural Chemistry,undefined
[3] Hungarian Academy of Sciences,undefined
[4] Laboratoire de Physique de l’État Condensé,undefined
[5] UMR CNRS 6087,undefined
[6] Université du Maine,undefined
[7] Institute for Chemical Technology of Inorganic Materials,undefined
[8] Johannes Kepler University,undefined
[9] Institute of Nuclear Research of the Hungarian Academy of Sciences,undefined
来源：
The European Physical Journal B - Condensed Matter and Complex Systems | 2005年 / 43卷
关键词：
Perovskite; Magnetic Susceptibility; Electronic Charge; Isomer Shift; Magnetic Phase;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
La0.8Sr0.257Fe0.05Co0.95O3-δ 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-δ . 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-δ are interpreted as evidence for the existence of superparamagnetic like Co clusters and a corresponding cluster glass magnetic phase formed below T ≈65 K.
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页码：297 / 303
页数：6
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