Abstract
For the invar-type itinerant ferromagnet Lu(Co 1- x Al x ) 2 ( x =0.125, 0.15), the nuclear spin-lattice relaxation rate 1/ T 1 of 27 Al has been measured. The observed temperature independent 1/ T 1 above T C was compared quantitatively with predictions based on two different theories: the hyperfine-broadened exchange-narrowed theory for the localized moment system and the self-consistent renormalization theory of spin fluctuations for the weakly itinerant ferromagnet. However, neither of the two dynamical theories furnish quantitative interpretation of the experimental results. This fact implies that the present system belongs to the intermediate regime ferromagnet.
Published Version
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