Title | $\bete$-nmr of Palladium foil |
Publication Type | Journal Article |
Year of Publication | 2006 |
Authors | Parolin, TJ, Salman, Z, Chakhalian, J, Wang, D, Keeler, TA, Hossain, M, Kiefl, RF, Chow, KH, Morris, GD, Miller, RI, MacFarlane, WA |
Journal | Physica B: Condensed Matter |
Volume | 374–375 |
Pagination | 419 - 422 |
ISSN | 0921-4526 |
Keywords | Nuclear probes |
Abstract | Beta-detected \{NMR\} ( β -nmr) of low-energy implanted 8Li+ was studied in metallic palladium. The resonance was found to have a large negative shift with respect to the reference signal in the cubic insulator MgO. This shift exhibited significant temperature dependence on cooling below room temperature, approximately proportionate to the temperature-dependent spin susceptibility of pure Pd. Thus it is tentatively attributed to a Knight shift (K) caused by a large negative hyperfine coupling; a phenomenon common in transition metal ions, but not in alkalis. However, the spin-lattice relaxation of 8Li is much slower than expected from the Korringa law for such a large K. We compare results from samples of very different thicknesses: 12.5 μ m foil and a 100 nm thin film. |
URL | http://www.sciencedirect.com/science/article/pii/S0921452605013396 |
DOI | 10.1016/j.physb.2005.11.121 |