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Mechanism of transition between -axis and -axis growth of thick films grown on substrate
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10.1063/1.2203517
/content/aip/journal/jap/99/11/10.1063/1.2203517
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/11/10.1063/1.2203517

Figures

Image of FIG. 1.
FIG. 1.

The schematic illustration of vertical dipping method as a continuous traveling mode

Image of FIG. 2.
FIG. 2.

XRD patterns of YBCO films grown by using different melts and : (a) , and , respectively; (b) , , 985, and , respectively.

Image of FIG. 3.
FIG. 3.

(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.

Image of FIG. 4.
FIG. 4.

(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.

Image of FIG. 5.
FIG. 5.

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.

Image of FIG. 6.
FIG. 6.

SEM patterns of protruding -axis grains on -dominated film dipped from (a) melt and (b) melt.

Image of FIG. 7.
FIG. 7.

SEM patterns of the boundary line on -dominated film dipped from (a) melt and (b) melt.

Image of FIG. 8.
FIG. 8.

An integrated illustration showing that the phase crossover occurred along the shift of undercooling and composition.

Image of FIG. 9.
FIG. 9.

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).

Tables

Generic image for table
Table I.

The values of -phase ratio under various growth conditions.

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/content/aip/journal/jap/99/11/10.1063/1.2203517
2006-06-15
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Mechanism of transition between a-axis and c-axis growth of YBa2Cu3Ox thick films grown on NdGaO3 substrate
http://aip.metastore.ingenta.com/content/aip/journal/jap/99/11/10.1063/1.2203517
10.1063/1.2203517
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