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Hyperfine fields and Fe magnetic moments in Fe−Ni invar alloys

  • Magnetism and Magnetic Materials
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Abstract

Mössbauer spectra of Fe1−x Ni x withx=0.40, 0.35 and 0.32 were taken at various temperatures and fitted withB hf distributions. TheP(B hf) curves generally show a peak and a low-field tail. The peakB * and the average\(\bar B\) were obtained in theT→0 limit. Fe moments were deduced from these data with help of a semiempirical equation. While the average\(\bar \mu _{Fe} \) decreases withx (invar anomaly), a large fraction of Fe atoms retain the strong moment (≈ 2.7 μB) typical of Ni-rich alloys. This result is consistent with a two-states model for invar.

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Authors and Affiliations

  1. Instituto de Física, Universidade de S. Paulo, C.P. 20516, 01498, S. Paulo, Brasil

    H. R. Rechenberg

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  1. H. R. Rechenberg
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Rechenberg, H.R. Hyperfine fields and Fe magnetic moments in Fe−Ni invar alloys. Hyperfine Interact 54, 683–687 (1990). https://doi.org/10.1007/BF02396112

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  • DOI: https://doi.org/10.1007/BF02396112

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