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- W2802808708 abstract "We report the decomposition of La2-xSrxCuO4 into La2O3 and Cu nanoparticles in ultra-high vacuum, observed by in-situ heating experiments in a transmission electron microscope (TEM). The analysis of electron diffraction data reveals that the phase decomposition process starts at about 150 °C and is considerably expedited in the temperature range of 350-450 °C. Two major resultant solid phases are identified as metallic Cu and La2O3 by electron diffraction, simulation, and electron energy-loss spectroscopy (EELS) analyses. With the aid of calculations, La2O3 phases are further identified to be derivatives of a fluorite structure - fluorite, pyrochlore, and (distorted) bixbyite - characterized by different oxygen-vacancy order. Additionally, the bulk plasmon energy and the fine structures of the O K and La M4,5 EELS edges are reported for these structures, along with simulated O K X-ray absorption near-edge structure. The resultant Cu nanoparticles and La2O3 phases remain unchanged after cooling to room temperature." @default.
- W2802808708 created "2018-05-17" @default.
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- W2802808708 date "2018-05-07" @default.
- W2802808708 modified "2023-10-01" @default.
- W2802808708 title "Decomposition of La2-xSrxCuO4 into Several La2O3 Phases at Elevated Temperatures in Ultra-High Vacuum inside a Transmission Electron Microscope" @default.
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