Static and dynamic critical behaviour of the freezing transition in the random-exchange Ho5Co50Al45 alloy

Random-exchange metallic spin glass Ho5Co50Al45 is investigated by static a nd dynamic magnetization measurements. The specimen is initially characteri zed as spin-glass-like below the freezing point T-f similar to 14 K. The fr eezing phenomenon at T-f is examined by static and dynamic scaling analysis . The results support the existence of a paramagnetic-spin-glass phase tran sition at T-g approximate to 14.2 K, with critical exponents of the transit ion as delta = 6.4, phi = 3.3 and zv = 11.8.