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Mössbauer study of paramagnetic relaxation effect in mixed crystals: High spin Fe3+ compounds diluted in diamagnetic hosts

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Abstract

The57Fe Mössbauer spectra were measured in mixed crystals with different types of chemical bonding and crystal structure, i.e., (Fe,Al)(acac)3, (Fe,Co)(acac)3, K3[(Fe,Al)(ox)3]3H2O, and NH4(Fe,Al)(SO4)212H2O. The broadening of Mössbauer linewidth with increasing Fe3+−Fe3+ distance became less enhanced in the order: (Fe,Al)(acac)3>(Fe,Co)(acac)3, or K3[(Fe,Al)(ox)3]3H2O>(Fe,Al)(acac)3>NH4(Fe,Al)(SO4)212H2O. Furthermore, it was found that the broadening of the linewidth was larger in neat tris (β-diketonato) iron(III) complexes than in (Fe,Al)(acac)3. Based on these results, the determining factors of the paramagnetic relaxation time other than Fe3+−Fe3+ distance and temperature were examined in terms of the Mössbauer linewidth as an indicator.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, The University of Tokyo, Hongo, 113, Tokyo, Japan

    S. Yamauchi, Y. Sakai & T. Tominaga

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  1. S. Yamauchi
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  2. Y. Sakai
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  3. T. Tominaga
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Yamauchi, S., Sakai, Y. & Tominaga, T. Mössbauer study of paramagnetic relaxation effect in mixed crystals: High spin Fe3+ compounds diluted in diamagnetic hosts. Journal of Radioanalytical and Nuclear Chemistry Letters 146, 185–196 (1990). https://doi.org/10.1007/BF02165220

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  • DOI: https://doi.org/10.1007/BF02165220

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