An analysis of the spin-lattice relaxation of cubic transition metals

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Abstract
The spin-lattice relaxation rates of cubic transition metals (V, Cu, Nb, Mo, Rh, Pd and Ag) are calculated using the ab initio LMTO self-consistent band structure calculation. It is found that the p symmetry contribution is fairly large for BCC metals and that the core polarisation without exchange enhancement gives a minor contribution. The theoretical relaxation rates reproduce experiment reasonably well for V, Nb and Mo, but some noticeable discrepancies exist for other metals, especially for Pd. It is pointed out that the inclusion of the relativistic enhancement of the electron density at the nucleus may reduce the discrepancy and that the exchange enhancement of the core polarisation contribution should be taken into account for Pd.

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