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The optical response of 200nm thick La0.7Sr0.3MnO(3−δ) films, deposited by pulsed laser deposition on amorphous silica substrates heated at nearly 600°C, under different oxygen pressures (0.1Pa, 0.5Pa, 1Pa, 5Pa and 10Pa), is reported. The effects of the oxygen non-stoichiometry are investigated at room temperature dealing with the absorption coefficient and the Tauc's plot method rather than conventional...
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