Electronic structures of Fe in La1−x Ba x FeO3−y (0≤x≤0.70) |
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Authors: | J. Li X. Cai T. M. Wang |
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Affiliation: | (1) Department of Materials Science, Lanzhou University, 730000 Lanzhou, China;(2) Department of Modern Physics, Lanzhou University, 730000 Lanzhou, China |
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Abstract: | Mössbauer spectra of La1–xBaxFeO3–y recorded at room temperature for various values of x show a six-line and/or a single-line subspectrum. The six-line subspectrum with IS=0.41 mm/s and H=52 T results from an orthorhombic perovskite containing only Fe3+ ions. The single-line subspectrum at 0.17 mm/s from a cubic perovskite can be assigned to neither Fe3+ nor Fe4+ but to an intermediate valence state, which may be due to electron hopping between the Fe3+ and Fe4+ ions on the identical octahedral sites. The temperature dependence of electron hopping in the compound La0.40Ba0.60FeO3–y is presented. |
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Keywords: | 76.80.+y |
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