Temperature dependence of nuclear spin-relaxation rates for Fe, Co and Ni

Abstract

Numerical calculations of the temperature dependence of the longitudinal (T1-1) and transverse (T2-1) nuclear spin-relaxation rates for Fe, Co and Ni are performed for both ferromagnetic and paramagnetic states, using the first-principles density of states and various approximations of the spin-fluctuation theory. If the spin fluctuations are taken into account, the quantities (T1T)-1 and (T2T)-1 depend significantly on temperature. Near TC in the ferromagnetic region they increase sharply, the increases being monotonic and similar for the two rates, just as observed experimentally.