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Muon Spin Dynamics and Sites in GdNi5 |
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| Authors: | A M Mulders P C M Gubbens CT Kaiser A Amato FN Gygax A Schenck P Dalmas de Réotier A Yaouanc KHJ Buschow F Kayzel AA Menovsky |
| Institution: | (1) Department of Physics, Monash University, Clayton, Victoria, 3800, Australia;(2) Interfaculty Reactor Institute, Technical University Delft, The Netherlands;(3) Laboratory for Muon-Spin Spectroscopy, Paul Scherrer Institute, Switzerland;(4) Institute for Particle Physics, ETH Zurich, Switzerland;(5) Commissariat à l'Energie Atomique, DRFMC, F-38054 Grenoble cedex 9, France;(6) Van der Waals-Zeeman Instituut, University of Amsterdam, The Netherlands |
| Abstract: | In GdNi5, the muon localizes at the 3f interstitial site and below  80K a second muon site becomes populated, the so-called 6ring site. This ring site is metastable and the muon hops to the 3f site. We determine the mean time of stay of the muon in the ring site and show that it is governed by a multi-phonon quantum diffusion process. The coincidence energy is measured to be E
a
=272(10)K and the tunneling matrix element J=0.11(2)meV. |
| Keywords: | muon diffusion muon spin rotation and relaxation |
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