Temperature dependence of the imaginary part of magnetic susceptibility (IP
MS) for the disordered equiatomic CoPt alloy during annealing up to the Cur
ie point has been studied both experimentally and theoretically. The observ
ed peculiarities in the relaxation processes are attributed to the short-ra
nge chemical ordering in the course of heat treatment. (C) 1999 Elsevier Sc
ience B.V. All rights reserved.