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Relationship between growth rate and undercooling in Pt-added Y1Ba2Cu3O7−x

Published online by Cambridge University Press:  31 January 2011

A. Endo ,
H. S. Chauhan ,
Y. Nakamura  and
Y. Shiohara
A. Endo
Affiliation:
Superconductivity Research Laboratory, ISTEC, 1–10–13, Shinonome, Koto-ku, Tokyo, 135, Japan
H. S. Chauhan
Affiliation:
Superconductivity Research Laboratory, ISTEC, 1–10–13, Shinonome, Koto-ku, Tokyo, 135, Japan
Y. Nakamura
Affiliation:
Superconductivity Research Laboratory, ISTEC, 1–10–13, Shinonome, Koto-ku, Tokyo, 135, Japan
Y. Shiohara
Affiliation:
Superconductivity Research Laboratory, ISTEC, 1–10–13, Shinonome, Koto-ku, Tokyo, 135, Japan
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Abstract

Y1Ba2Cu307−x (Y123) crystals were grown by two different methods, the constant undercooling solidification and the continual cooling method, with top seeding by Sm123 seed crystals in order to investigate a relationship between undercooling (ΔT) and a growth rate (R). The crystals of Y123 with a sharp faceted interface, which consisted of {100} and {001} faces, grew epitaxially from the seed. It was found that the growth rates of {100} face (Ra) and that of {001} face (Rc) showed an increasing trend with increasing ΔT, and Rc was faster than Ra within these experimental conditions, ΔT < 20 K. The relation between R and ΔT follows the parabolic equation, viz. Ra ∝ ΔT1.9 and Rc ∝ ΔT1.3 for {100} and {001} faces, respectively. The simulated crystal size using the R and ΔT relations obtained from the constant undercooling method showed good agreement with experimental data by the continual cooling.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 5 , May 1996 , pp. 1114 - 1119
Copyright
Copyright © Materials Research Society 1996

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