beta-NMR of isolated lithium in nearly ferromagnetic palladium |
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Authors: | Parolin T J Salman Z Chakhalian J Song Q Chow K H Hossain M D Keeler T A Kiefl R F Kreitzman S R Levy C D P Miller R I Morris G D Pearson M R Saadaoui H Wang D MacFarlane W A |
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Institution: | Department of Chemistry, University of British Columbia, Vancouver, BC, V6T 1Z1, Canada. |
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Abstract: | The temperature dependence of the frequency shift and spin-lattice relaxation rate of isolated, nonmagnetic (8)Li impurities implanted in a nearly ferromagnetic host (Pd) are measured by means of beta-detected nuclear magnetic resonance (beta-NMR). The shift is negative, very large, and increases monotonically with decreasing T in proportion to the bulk susceptibility of Pd for T > T* approximately 100 K. Below T*, an additional shift occurs which we attribute to the response of Pd to the defect. The relaxation rate is much slower than expected for the large shift and is linear with T below T*, showing no sign of additional relaxation mechanisms associated with the defect. |
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