SPIN CORRELATION TIMES IN CR0.825FE0.175 ABOVE THE FREEZING TEMPERATURE

Magnetic correlations up to ten times the freezing temperature determi ned in the spin glass Cr0.825Fe0.175 by high-field Mossbauer spectrosc opy. The model based on stochastic formation and decay of these correl ated regions, used to analyse the spectra of the spin glass systems Y( Fe,Al)(2) and AuFe, is again successfully applied, irrespective of the completely different matrix materials. In agreement with the results obtained for these systems a power law for the temperature dependence of the correlation time with an exponent close to -2 is observed. This exponent is also found for me temperature dependence of the relaxatio n rate if the mu SR measurements on the same sample reported by Tellin g and Cywinski are analysed according to a Kohlrausch law.