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CO-Sputtered Composite films Of YBa2Cu3O7−xand LaAIO3

Published online by Cambridge University Press:  26 February 2011

L. H. Allen ,
E. J. Cukauskas ,
G. K. Sherrill  and
R. T. Holm
L. H. Allen
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375–5000
E. J. Cukauskas
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375–5000
G. K. Sherrill
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375–5000
R. T. Holm
Affiliation:
Naval Research Laboratory, Washington, D.C. 20375–5000
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Abstract

We have grown thin film composites of and YBa2Cu3O7−x and LaAlO3 by co-sputtering. A film with composition of 10% LaAIO3 by volume had a transition temperature of 58K and critical current density of 1.2 × 106 A/cm2 at 4K. We measured the temperature dependence of the critical current and obtained a good fit with Ginzburg-Landau theory for thin films. A perpendicular magnetic field was applied, and the critical current and pinning force measured. At 70 kOe, the critical current was suppressed only a factor of 4 from its zero-field value. The measured pinning force was 2 × 109 dyn/cm3 at 70 kOe and is comparable to that of YBa2Cu3O7−x films.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 275: Symposium S – Layered Superconductors: Fabrication, Properties and Applications , 1992 , 525
Copyright
Copyright © Materials Research Society 1992

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References

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