Abstract
Polycrystalline perovskite cobalt oxide Eu0.5Sr0.5CoO3 was prepared by the conventional solid-state reaction method. X-ray powder patterns indicated the prepared samples are pure, cubic perovskite structure (Pm3̄m), and with no evidence of any secondary phases. The dc magnetization and ac susceptibility measurements were carried out to investigate the magnetic properties of the sample, and which indicated that cluster-glasses properties are suppressed with the increasing of the coercive field. We denied the possibility of spin-glasses and the existence of the Hopkinson effect in Eu0.5Sr0.5CoO3 through the temperature-dependent ac susceptibility measurements, and explained the magnetic behavior of Eu0.5Sr0.5CoO3 with the competition between magnetic anisotropy and the external magnetic field.
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