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- W1965594080 abstract "Structural evolution of epitaxial La0.80Sr0.20CoO3−δ thin films under chemical and voltage stimuli was examined in situ using X-ray diffraction. The changes in lattice parameter (chemical expansivity) were used to quantify oxygen reduction reaction processes and vacancy concentration changes in lanthanum strontium cobaltite. At 550 °C, the observed lattice parameter reduction at an applied bias of −0.6 V was equivalent to that from the reducing condition of a 2% carbon monoxide atmosphere with an oxygen non-stoichiometry δ of 0.24. At lower temperatures (200 °C), the application of bias reduced the sample much more effectively than a carbon monoxide atmosphere and induced an oxygen non-stoichiometry δ of 0.47. Despite these large changes in oxygen concentration, the epitaxial thin film was completely re-oxidized and no signs of crystallinity loss or film amorphization were observed. This work demonstrates that the effects of oxygen evolution and reduction can be examined with applied bias at low temperatures, extending the ability to probe these processes with in-situ analytical techniques." @default.
- W1965594080 created "2016-06-24" @default.
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- W1965594080 date "2014-04-21" @default.
- W1965594080 modified "2023-09-26" @default.
- W1965594080 title "<i>In situ</i> examination of oxygen non-stoichiometry in La<sub>0.80</sub>Sr<sub>0.20</sub>CoO<sub>3−δ</sub> thin films at intermediate and low temperatures by x-ray diffraction" @default.
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- W1965594080 doi "https://doi.org/10.1063/1.4873542" @default.
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