TPD AND XPS STUDY ON THERMAL BEHAVIOR OF ABSORBED OXYGEN IN La1−xSrxCoO3

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Abstract
Two types of oxygen desorption from La1−xSrxCoO3 were revealed by the appearance of a broad desorption peak(α) below ca. 800°C and a sharp one(β) around 820°C. The binding energy of O ls level for absorbed oxygen was clearly different from that for lattice oxygen. Close examination shows that α is ascribable to the desorption of the absorbed oxygen while β may be the desorption of a part of lattice oxygen.

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