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A new hybrid two-zone/crucible furnace process for the growth of epitaxial Tl2Ba2CaCu2O8 superconducting films

Published online by Cambridge University Press:  31 January 2011

M. P. Siegal ,
D. L. Overmyer ,
E. L. Venturini ,
F. Dominguez  and
R. R. Padilla
M. P. Siegal
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185–1421
D. L. Overmyer
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185–1421
E. L. Venturini
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185–1421
F. Dominguez
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185–1421
R. R. Padilla
Affiliation:
Sandia National Laboratories, Albuquerque, New Mexico 87185–1421
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Abstract

Epitaxial Tl2Ba2CaCu2O8 (Tl-2212) films ∼5500 Å thick are grown on LaAlO3(100) substrates using a new hybrid two-zone/crucible furnace process enabling precise control of thallination. This method combines the best features of both conventional crucible and two-zone processing for the first time: superb film properties and reduced handling of hazardous Tl-oxide powders. Single-phase, highly caxis oriented Tl-2212 films are grown with smooth morphology, Meissner transition ∼103 K, and critical current density ∼1.1 × 107 A/cm2 at 5 K for twenty consecutive runs without having to change or add to the Tl-oxide source.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 12 , December 1998 , pp. 3349 - 3352
Copyright
Copyright © Materials Research Society 1998

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