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57Fe Mössbauer spectroscopy studies of Sr2Fe1−x Cr x Mo1−x W x O6 double perovskite compounds

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Abstract

Polycrystalline double perovskites Sr2Fe1−x Cr x Mo1−x W x O6 with x = 0, 0.05, 0.10, 0.15, 0.20, and 0.30 have been prepared by sold state reactions. A continuous decrease of the tetragonal unit cell parameters α and c with increasing x values is observed. The highest Curie temperature T C = 426 K is recorded for the x = 0.10 compound. 57Fe Mössbauer spectroscopy measurements indicate a non-integral electronic configuration of ∼3d5.3 for the Fe ions at the ordered double perovskite structure for x ≤ 0.20, which reaches ∼3d5.4 for x = 0.30. Fe–Mo/W anti-site and anti-phase boundary defects are observed in all samples in equal concentrations of around 3% of the total number of Fe ions in their structure.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, University of Ioannina, P.O. Box 1186, 45110, Ioannina, Greece

    A. P. Douvalis & I. Panagiotopoulos

  2. Physics Department, University of Ioannina, P.O. Box 1186, 45110, Ioannina, Greece

    A. Moukarika, T. Bakas & V. Papaefthymiou

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  1. A. P. Douvalis
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  2. I. Panagiotopoulos
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  3. A. Moukarika
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  4. T. Bakas
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  5. V. Papaefthymiou
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Correspondence to A. P. Douvalis.

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Douvalis, A.P., Panagiotopoulos, I., Moukarika, A. et al. 57Fe Mössbauer spectroscopy studies of Sr2Fe1−x Cr x Mo1−x W x O6 double perovskite compounds. Hyperfine Interact 168, 1145–1149 (2006). https://doi.org/10.1007/s10751-006-9414-2

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  • DOI: https://doi.org/10.1007/s10751-006-9414-2

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