NMR Study of Spin Fluctuations in Antiferromagnetic Cr_1−xV_x Alloys

Abstract

Nuclear spin relaxation for ⁵¹V in both the paramagnetic and ordered states of incommensurate antiferromagnetic Cr_1−xV_x (x=0.01, 0.02, 0.03 and 0.038) alloys have been investigated in a temperature range between 1.3 and 300 K. The experimental results of the temperature dependence of the relaxation rate (T₁T)⁻¹ are interpreted in terms of the contribution of spin fluctuations, which behaves as (T₁T)_sf⁻¹∝(T−T_N)^−1⁄2 for T>T_N, and the Korringa rate.