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Preparation and Properties of Superconducting thin Films by Excimer Laser Ablation

Published online by Cambridge University Press:  16 February 2011

Michael E. Geusic ,
Alan F. Stewart ,
Larry R. Pederson ,
William J. Weber ,
Kenneth R. Marken  and
Kin Li
Michael E. Geusic
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352
Alan F. Stewart
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352
Larry R. Pederson
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352
William J. Weber
Affiliation:
Pacific Northwest Laboratory, Richland, WA 99352
Kenneth R. Marken
Affiliation:
Battelle-Columbus Laboratories, Columbus, OH 43201
Kin Li
Affiliation:
Boeing Aerospace & Electronics, Renton, WA. 98124-2499
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Abstract

Excimer laser ablation with an in situ heat treatment was used to prepare high quality superconducting YBa2Cu3O7−x thin films on (100)-SrTiO3 and (100)-LaAlO3 substrates. A pulsed excimer laser (XeCl; 308 nm) was used to ablate a rotating, bulk YBa2Cu3O7−x target at a laser energy density of 2–3 J/cm2. Based on four-probe dc resistance measurements, the films exhibited superconducting transition temperatures (Tc, midpoint) of 88 and 87K with 2K (90–10%) transition widths for SrTiO3 and LaAlO3, respectively. Transport critical current densities (Jc) measured at 77K were 2 × 106 and 1 × 106 A/cm2 in zero field for SrTiO3 and LaAlO3, respectively. X-ray diffraction (XRD) analysis showed the films to be highly oriented, with the c-axis perpendicular to the substrate surface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 191: Symposium N – Laser Ablation for Materials Synthesis , 1990 , 147
Copyright
Copyright © Materials Research Society 1990

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References

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