Abstract
Experimental evidence of re-entrant spin glass (RSG) state has been revealed in Er-doped CeFe2 compounds. The zero-field–cooled - field-cooled bifurcation in dc magnetization, frequency dependence of freezing temperature, relaxation in zero-field–cooled magnetization and presence of large remanence have been discussed in detail. Frequency dependence is found to follow the critical slowing-down mechanism of the type: τ=τ0 ( Tf /TSG−1)−zv. The RSG state is found to be associated with the randomly magnetized clusters instead of atomic level randomness.