DYNAMIC SCALING IN CD1-XMNXTE SPIN-GLASSES - A PROBE OF THE SPIN AUTOCORRELATION FUNCTION

The dynamic scaling relations for the frequency-dependent magnetic sus ceptibility are derived, using the spin autocorrelation function q(t) is-proportional-to t(-a) exp[-(t/tau)b], which successfully describes results from Monte Carlo simulations on a three-dimensional Ising spin -glass model. This functional form accounts very well for the observed frequency and temperature dependences of the imaginary component of t he ac magnetic susceptibility in Cd1-xMnxTe, above the spin-glass tran sition temperature T(c). The parameters a and b obtained from the scal ing analysis are very comparable to those found for Fe0.5Mn0.5TiO3, cl ose to T(c), emphasizing the similar critical behavior of short-range insulating spin glasses, of Heisenberg and Ising type.