The relation between the undercooling and the growth rate of YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}} superconductive oxide
- Superconductivity Research Laboratory, International Superconductivity Technology Center, 1-10-13 Shinonome, Koto-ku, Tokyo, 135 (Japan)
To clarify the effect of undercooling on the crystal growth of Y-123, the growth rate was measured with different undercoolings. The growth rate of the {l_brace}100{r_brace} face shows a quadratic dependence of undercooling, while that of the {l_brace}001{r_brace} face shows a linear dependence in the sample with nominal 123 composition. In the case with 211-rich composition, the growth rate of each face was larger than that compared with nominal 123 composition since the mass flux from 211 particle for peritectic reaction becomes large. Addition of excess 211 alters the undercooling dependence of {ital R}{sub {ital a}} from quadratic to linear. This is considered that the entrapment of 211 particles into 123 crystals supplies step sources beside screw dislocations. The growth rate of the {l_brace}001{r_brace} face is larger than that of the {l_brace}100{r_brace} face up to 26{degree} of undercooling. {copyright} {ital 1996 Materials Research Society.}
- OSTI ID:
- 284269
- 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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