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Dipolar magnetic field and fermi contact field at the μ+ site in α-Fe at very low temperatures

  • Session 2. Magnetism
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Abstract

In a longitudinalμ +SR experiment on a high-purityα-Fe single crystal sphere magnetically saturated in a 〈 111 〉 direction damped oscillations (wiggles) were observed in a temperature range 30 mK to 600 mK and in a certain regime of applied magnetic fieldsB appl. Meassurements of the wiggle frequency as a function ofB appl give us directly the Fermi fieldB Fermi=(−1.13±0.02)T and the dipolar magnetic field ¦B ∥dip ¦=(0.66±0.03)T.B ∥dip was used to determine the prefactor in the Arrhenius law obeyed by theμ + hopping rate between 100 K and 1000 K. A comparision with the corresponding values for protons and deuterons suggests diffusion via the adiabatic mechanism.

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Authors and Affiliations

  1. Institut für Physik, Max-Planck-Institut für Metallforschung, Heisenbergstr. 1, D-70569, Stuttgart, Germany

    L. Schimmele, A. Seeger, W. Templ, T. Grund, M. Iwanowski, K. Maier & J. Major

  2. Institut für Theoretische und Angewandte Physik, Universität Stuttgart, Pfaffenwaldring 57, D-70569, Stuttgart, Germany

    A. Seeger, T. Stammler, M. Hampele & T. Pfiz

  3. Paul-Scherrer-Institut, CH-5232, Villigen, Switzerland

    C. Baines & D. Herlach

Authors
  1. L. Schimmele
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  2. A. Seeger
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  3. T. Stammler
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  4. W. Templ
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  5. C. Baines
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  6. T. Grund
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  7. M. Hampele
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  8. D. Herlach
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  9. M. Iwanowski
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  10. K. Maier
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  11. J. Major
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  12. T. Pfiz
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Schimmele, L., Seeger, A., Stammler, T. et al. Dipolar magnetic field and fermi contact field at the μ+ site in α-Fe at very low temperatures. Hyperfine Interact 85, 337–343 (1994). https://doi.org/10.1007/BF02069444

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  • DOI: https://doi.org/10.1007/BF02069444

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