Magnetization and electrical resistivity studies have established that ${\mathrm{La}}_{0.5}{\mathrm{Ba}}_{0.5}{\mathrm{CoO}}_{3\ensuremath{-}\ensuremath{\gamma}}$ (LaBaC) is a metallic ferromagnet whereas ${\mathrm{Pr}}_{0.5}{\mathrm{Ba}}_{0.5}{\mathrm{CoO}}_{3\ensuremath{-}\ensuremath{\gamma}}$ (Pr...
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