Abstract
dc magnetization and ac susceptibility measurements were carried out in a polycrystalline compound with composition Pr0.7Sr0.3CoO3. Low-field dc magnetization and frequency-dependent ac susceptibility results suggest a cluster-glass-like transition at 165 K. When the sample was cooled in a static magnetic field, shifts in the magnetic hysteresis loop were observed at 5 K. Shifts in the hysteresis loop are the typical manifestation of exchange bias (EB) effect. Training effect observed at 5 K is one of the supportive experimental evidences of EB effect which could be satisfactorily analyzed by the relaxation model. EB effect is suggested due to the pinning effect at the ferromagnetic/spin-glass interface in a spontaneously phase separated cluster-glass compound.
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