The schematic illustration of vertical dipping method as a continuous traveling mode
XRD patterns of YBCO films grown by using different melts and : (a) , and , respectively; (b) , , 985, and , respectively.
(Color online) Optical images of typical morphology of as-grown YBCO films with different orientations: (a) the edge of -dominated film, (b) spiral island on -dominated film, and (c) spiral island on -dominated film. The arrows in the image, respectively, indicate (1) the cracks along the film, (2) the ⟨010⟩ and ⟨100⟩ directions of -axis YBCO grain, and (3) Ba–Cu–O liquids attaching on the surface of the film.
(Color online) Optical micrographs of the dipping region of YBCO with peculiar morphology. The region is divided into (A) boundary area between YBCO and NGO, (B) intermediary area, and (C) bottom area. (a) and (b) correspond to region A of the -phase dominated film grown by using a melt and 3:5 melt, respectively. (c) and (d) correspond to region B of the -phase dominated film grown by using a melt and 3:5 melt, respectively. (e) corresponds to region C of the -phase dominated film grown by using a melt, which the case of using a melt is quite similar to.
Optical micrograph of -dominated film after holding at for . The arrows in the image, respectively, indicate (1) the long-axis grains which still maintained original orientation; (2) the melting liquid.
SEM patterns of protruding -axis grains on -dominated film dipped from (a) melt and (b) melt.
SEM patterns of the boundary line on -dominated film dipped from (a) melt and (b) melt.
An integrated illustration showing that the phase crossover occurred along the shift of undercooling and composition.
A schematic illustration presenting the mechanism of the transition under different environments ( axis represents growth rate, while axis represents supersaturation; two curves represent growth rate of and phases, respectively).
The values of -phase ratio under various growth conditions.
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