Abstract
We have prepared a series of polycrystalline samplesLa0.5Sr0.5CoO3−δ with and characterized their oxygen content, crystal structure, and magnetic properties.While the fully oxygenated samples are good ferromagnets, samples with largerδ values display increasingly broad magnetic transitions. The saturation magnetization at 5 K falls rapidlyas δ increases. First-principles electronic structure calculations provide insights intothe magnetic behaviour of the fully oxygenated compound, and the manner inwhich ferromagnetic ordering is affected by increasing oxygen non-stoichiometry.
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