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Nuclear orientation of60Co in concentrated CoAu alloys

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Abstract

We report β-particle and γ-ray angular distribution measurements from60Co oriented in CoAu at low temperatures in applied fields up to 72 kOe and Co concentrations of 0.95 to 11 at.%. The results are explained by assuming a random molecular field interaction between groups of Co impurities. The hyperfine field on Co nuclei in groups of three or more nearest neighbors is negative and has a value near −180 kOe. The induced field on Co-pair nuclei is small and probably also negative. Complete polarization of the Co moments in the more concentrated alloys requires a very large applied field.

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Authors and Affiliations

  1. Fachbereich Physik der Freien Universität Berlin, 1, Berlin 33, W. Germany

    J. Boysen, W. D. Brewer & E. Klein

Authors
  1. J. Boysen
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  2. W. D. Brewer
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  3. E. Klein
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Additional information

This work was supported in part by the Bundesministerium für Bildung und Wissenschaft. A preliminary report was contributed to the International Conference on Hyperfine Interactions, Uppsala, 1974.

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Boysen, J., Brewer, W.D. & Klein, E. Nuclear orientation of60Co in concentrated CoAu alloys. Hyperfine Interact 1, 55–64 (1975). https://doi.org/10.1007/BF01022442

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  • DOI: https://doi.org/10.1007/BF01022442

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