Beta-NMR of Isolated Lithium in Nearly Ferromagnetic Palladium

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.

Beta-NMR of Isolated Lithium in Nearly Ferromagnetic Palladium

Authors

Description

The temperature dependence of the frequency shift and spin-lattice relaxation rate of isolated, nonmagnetic Li-8 impurities implanted in a nearly ferromagnetic host (Pd) are measured by means of beta-detected nuclear magnetic resonance (b-NMR). The shift is negative, very large and increases monotonically with decreasing T in proportion to the bulk susceptibility of Pd for T > T*~ 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.
4 pages, 3 figures