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An57Fe Mössbauer study of rare-earth intermetallic compounds R(Fe11Ti)

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Abstract

57Fe Mössbauer spectra are reported for the ThMn12 structure series of intermetallic compounds R(Fe11Ti) (R=Y, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Lu). The Mössbauer spectroscopy of oriented absorbers has been used to study the spin reorientation transitions exhibited by the members of the series where the second-order Stevens coefficient αJ of the rare-earth (Nd, Tb and Dy) is negative. A simple model has been established to deduce the canting angle from the Mössbauer spectra of oriented absorbers. The results are analyzed in terms of a crystal-field model. The crystal field parameters must be increased significantly to account for the observed large anisotropy in the Sm(Fe11Ti) compound, which may find applications as a permanent magnet.

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Authors and Affiliations

  1. Department of Pure and Applied Physics, Trinity College, 2, Dublin, Ireland

    Bo-Ping Hu, Hong-Shuo Li & J. M. D. Coey

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  1. Bo-Ping Hu
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  2. Hong-Shuo Li
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  3. J. M. D. Coey
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Hu, BP., Li, HS. & Coey, J.M.D. An57Fe Mössbauer study of rare-earth intermetallic compounds R(Fe11Ti). Hyperfine Interact 45, 233–240 (1989). https://doi.org/10.1007/BF02405883

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