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Surface nucleation, domain growth mechanisms, and factors dominating superconducting properties in seeded melt grown YBa2Cu3Ox

Published online by Cambridge University Press:  31 January 2011

Donglu Shi
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0012
K. Lahiri
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0012
D. Qu
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0012
S. Sagar
Affiliation:
Department of Materials Science and Engineering, University of Cincinnati, Cincinnati, Ohio 45221-0012
V. F. Solovjov
Affiliation:
Department of Superconductivity, Institute for Metal Physics, 252142 Kiev, Ukraine
V. M. Pan
Affiliation:
Department of Superconductivity, Institute for Metal Physics, 252142 Kiev, Ukraine
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Abstract

Using a seeded melt growth (SMG) method, we have produced single-domain YBa2Cu3Ox with high levitation forces and trapped magnetic fields. A threshold temperature TL has been found above which extraneous nucleation does not occur. Surface nucleation has been suppressed when the top sample surface is coated with low melting compounds. The planar growth rates along the a- and c-axes have been found to be comparable within the undercooling range used in this study, and agree well with the current model. Major factors that strongly influence the levitation force have been studied in detail including domain geometry and orientation. Current physical models have been used to interpret the observed levitation force behaviors.

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Articles
Copyright
Copyright © Materials Research Society 1997

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References

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