Abstract
Magnetic properties have been studied for the perovskite Pr1−xBaxCoO3 (0≤x≤0.5). Ferromagnetic order is observed below ∼190 K for x≥0.2 in dc susceptibility–temperature curves. Magnetic circular dichroism spectra were measured for a ferromagnetic phase at Co–L2,3, Pr–M4,5, Ba–M4,5, and O–K edges. It is revealed that the Co ion has both spin and orbital moments. It is also observed that the Ba 4f orbitals have a localized moment and exhibit ferromagnetic order at low temperatures, though Ba2+ is expected to be almost only in a nonmagnetic 4f0 state. Magnetic order is observed also for Pr 4f and O 2p.
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