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

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

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13 Citations (Scopus)


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+ → Fe 4+ 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.

Original languageEnglish
Pages (from-to)297-303
Number of pages7
JournalEuropean Physical Journal B
Issue number3
Publication statusPublished - Feb 1 2005

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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    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. (2005). The effect of iron doping in La0.8Sr0.2Fe0.05Co0.95O3-δ perovskite. European Physical Journal B, 43(3), 297-303.