To se exy the effects of thermal annealing on the structure of Ge x As y Se exy 1-x-y thin films, the thermal evolution of these films was measured by the in situ X-ray diffraction XRD at different temperature K or K in a vacuum 10 -1 Pa environment. The entire process of crystallization can be observed by using in situ XRD, which is from the appearance of a crystal structure to melting liquid-state and ultimately to the disappearance of the amorphous structure.
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