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Hyperfine interaction of Eu impurities implanted in nickel

  • Applications of Hyperfine Interactions to Physics of Condensed Matter
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Abstract

Radioactive151Dy ions were implanted at room temperature into a polycrystalline nickel foil to a total dose of 2.1014 at/cm2. Mössbauer spectroscopy was performed on the 21.54 keV transition of151Eu occuring in the decay of151Gd. The results show that Eu is trivalent in this host and that the large majority of the Eu atoms is located on substitutional lattice sites. The low-temperature magnetic hyperfine field was determined as Bhf=75.1(7) T. From this value the magnitude of the exchange field acting on the Eu3+ spin could be derived: Bex=−49(7) T. The temperature dependence of the hyperfine field suggests that the spinorbit coupling acting in the Eu3+ core is about 15% lower than in insulating compounds.

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Author notes

  1. G. L. Zhang

    Present address: Institute of Nuclear Research, Academia Sinica, P.O. Box 8204, Shanghai

Authors and Affiliations

  1. Laboratorium voor Algemene Natuurkunde, Materials Science Centre, Westersingel 34, 9718 CM, Groningen, The Netherlands

    L. Niesen & G. L. Zhang

  2. EP-division, CERN, ISOLDE-collaboration, CH-1211, Geneva 23, Switzerland

    H. Andreasen & G. Weyer

Authors
  1. L. Niesen
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  2. G. L. Zhang
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  3. H. Andreasen
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  4. G. Weyer
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Niesen, L., Zhang, G.L., Andreasen, H. et al. Hyperfine interaction of Eu impurities implanted in nickel. Hyperfine Interact 59, 271–275 (1990). https://doi.org/10.1007/BF02401227

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  • DOI: https://doi.org/10.1007/BF02401227

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