Magnetic field dependence of impurity-induced muon depolarization in noble metals |
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| Authors: | M. E. Schillaci R. H. Heffner R. L. Hutson M. Leon D. W. Cooke A. Yaouanc S. A. Dodds P. M. Richards D. E. MacLaughlin C. Boekema |
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| Affiliation: | (1) Los Alamos National Laboratory, 87545 Los Alamos, NM, USA;(2) Rice University, 77001 Houston, TX, USA;(3) Sandia National Laboratories, 87185 Albuquerque, NM, USA;(4) University of California, 92521 Riverside, CA, USA;(5) Texas Tech University, 79409 Lubbock, TX, USA;(6) Present address: Laboratoire d'Interactions Hyperfines, Grenoble, France |
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| Abstract: | We have measured the magnetic field dependence of the muon depolarization rate up to 5 kOe in AuGd (350 ppm), AgGd (340 ppm) and AgEr (300 ppm). A simple model which includes both dipolar and nearest-neighbor contact interactions between the muon and the magnetic impurity does not fit the data. An axial crystal-field interaction, arising from the electric field gradient induced by the muon at the site of the impurity, is found to dominate the Hamiltonian, and may have a large effect on the field dependence.Supported in part by the U.S. Department of Energy and the National Science Foundation.Work performed at Sandia National Laboratories supported by the U.S. Department of Energy under contract DE-AC04-76DP000789. |
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