Torque relaxation data on a Cu 5‐at. % Mn sample at different temperatures are presented. The relaxations after field cooling and after zero‐field cooling are different at each temperature, implying that the in‐field states of the sample after these two procedures are different. Torque data for the effective anisotropyKare compared with values from experiments having shorter time windows so as to obtain information on relaxation over a very wide time spectrum. The estimated effectiveTgvalues tend to a frequency‐independent limit at low frequencies.