NMR Study of Nearly Itinerant Ferromagnetic LuCo₂

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The Knight shift and the nuclear spin-lattice relaxation rate, 1⁄T₁, of ⁵⁹Co in LuCo₂ have been measured. 1⁄T₁T due to the d-electron spins was found to be proportional to the d-spin susceptibility in good agreement with the SCR theory. From the quantitative analysis, the characteristic temperature, T₀, implying the energy width of the dynaical spin-fluctuation spectrum is estimated for LuCo₂ together with those for the typical nearly ferromagnetic metals. The value T₀ may be related to the degree of the ferromagnetic tendency as welll as the temperature of χ maximum in the nearly itinerant ferromagnet.