Relationship between growth rate and undercooling in Pt-added Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}
- Superconductivity Research Laboratory, ISTEC, 1-10-13, Shinonome, Koto-ku, Tokyo, 135 (Japan)
Y{sub 1}Ba{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}} (Y123) crystals were grown by two different methods, the constant undercooling solidification and the continual cooling method, with top seeded by Sm123 seed crystals in order to investigate a relationship between undercooling ({Delta}{ital T}) and a growth rate ({ital R}). The crystals of Y123 with a sharp faceted interface, which consisted of {l_brace}100{r_brace} and {l_brace}001{r_brace} faces, grew epitaxially from the seed. It was found that the growth rates of {l_brace}100{r_brace} face ({ital Ra}) and that of {l_brace}001{r_brace} face ({ital Rc}) showed an increasing trend with increasing {Delta}{ital T}, and {ital Rc} was faster than {ital Ra} within these experimental conditions, {Delta}{ital T}{lt}20 K. The relation between {ital R} and {Delta}{ital T} follows the parabolic equation, viz. {ital Ra}{proportional_to}{Delta}{ital T}{sup 1.9} and {ital Rc}{proportional_to}{Delta}{ital T}{sup 1.3} for {l_brace}100{r_brace} and {l_brace}001{r_brace} faces, respectively. The simulated crystal size using the {ital R} and {Delta}{ital T} relations obtained from the constant undercooling method showed good agreement with experimental data by the continual cooling. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 371332
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 5 Vol. 11; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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