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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