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 M¨ossbauer 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.
| Original language | English |
|---|---|
| Pages (from-to) | 297 - 303 |
| Number of pages | 7 |
| Journal | The European Physical Journal B: Condensed Matter and Complex Systems |
| Volume | 43 |
| Publication status | Published - 2005 |
Fields of science
- 104005 Electrochemistry
- 104006 Solid state chemistry
- 104014 Surface chemistry
- 104017 Physical chemistry
- 105113 Crystallography
- 105116 Mineralogy
- 503013 Subject didactics of natural sciences
- 204 Chemical Process Engineering
- 204001 Inorganic chemical technology
- 205016 Materials testing
- 210006 Nanotechnology
- 211104 Metallurgy
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