Double Magnetic Transition in Pr0.5Sr0.5CoO3

Abstract

We report studies of polycrystalline samples of the metallic ferromagnet Pr0.5Sr0.5CoO3 through measurements of the magnetization, a.c. magnetic susceptibility, resistivity, and specific heat. We find an unusual anomaly around TA = 120 K, much below the ferromagnetic transition (TC = 226 K). The anomaly is manifested in field cooled magnetization as a downward step in low fields (H less than or equal to 0.01 T) but is transformed into an upward step for H greater than or equal to 0.05 T. The anomaly cannot be easily attributed to antiferromagnetic ordering, but may correspond to a second ferromagnetic transition or an alteration of the ferromagnetic state associated with orbital ordering.

arXiv comment18 pages including 6 figures

References in corpus (2)

• Phase Separation and the Low-Field Bulk Magnetic Properties of Pr0.7Ca0.3MnO3
• Nanoscale anisotropic structural correlations in the paramagnetic and ferromagnetic phases of Nd0.5Sr0.5 MnO3

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