Nuclear-Spin Relaxation and Knight Shift in Transition Metals

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Abstract
The electron-phonon enhancement of electronic specific heat and the effective Coulomb enhancement of spin susceptibility are taken into account, the former through the Eliashberg-McMillan theory of superconductivity for transition metals and the latter through gyromagnetic effect experiment, in calculating the nuclear-spin relaxation rates in transition metals. The nuclear-spin relaxation rate of vanadium determined experimentally is found to be consistent with the conjecture that the observed Knight shift is almost entirely due to orbital paramagnetism. Inclusion of the above corrections gives better qualitative agreement with observed relaxation rates for V, Nb, and Pt.