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The temperature dependence of the57Fe hyperfine magnetic field distribution in Fe-Ni

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Abstract

The temperature dependence of the57Fe hyperfine magnetic field (hmf) in Fe-Ni is stronger than the temperature dependence of the57Fe hmf in pure Fe. By analyzing the shape of the57Fe hmf distribution, and with the help of experiments with Si in Fe-Ni, we deduce that this anomalous temperature dependence originates from a large thermal sensitivity of the magnetic moments at those Fe atoms with more Ni nearest neighbors. A strong temperature dependence of the recoilfree fraction was also observed in Fe-Ni alloys. We suggest that a large mean square thermal displacement of Fe atoms in Fe-Ni is the cause of the anomalous temperature dependence.

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Author notes

  1. B. Fultz

    Present address: Keck Lab. of Engineering Materials, Califorinia Institute of Technology, 91125, Pasadena, Calif., USA

Authors and Affiliations

  1. Materials and Molecular Research Div., Lawrence Berkeley Lab., University of California, 94720, Berkeley, California, USA

    B. Fultz & J. W. Morris Jr.

  2. The Dept. of Materials Science and Mineral Engineering, University of California, 94720, Berkeley, California, USA

    B. Fultz & J. W. Morris Jr.

Authors
  1. B. Fultz
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  2. J. W. Morris Jr.
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Fultz, B., Morris, J.W. The temperature dependence of the57Fe hyperfine magnetic field distribution in Fe-Ni. Hyperfine Interact 28, 553–556 (1986). https://doi.org/10.1007/BF02061509

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  • DOI: https://doi.org/10.1007/BF02061509

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