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Imaging Transport Current Distribution in High Temperature Superconductors Using Room Temperature Scanning Laser Microscope

Published online by Cambridge University Press:  18 March 2011

C. Kwon ,
B. E. Klein ,
S. Seo ,
B. H. Park  and
Q. X. Jia
C. Kwon
Affiliation:
Department of Physics and Astronomy, California State University–Long Beach, Long Beach, CA 90840, USA
B. E. Klein
Affiliation:
Department of Physics and Astronomy, California State University–Long Beach, Long Beach, CA 90840, USA
S. Seo
Affiliation:
Department of Physics and Astronomy, California State University–Long Beach, Long Beach, CA 90840, USA
B. H. Park
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
Q. X. Jia
Affiliation:
Superconductivity Technology Center, Los Alamos National Laboratory, Los Alamos, NM 87545, USA
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Abstract

We report the feasibility of room temperature scanning laser microscopy (RTSLM) for the study of high temperature superconducing films. RTSLM images from SmBa2Cu3O7 and how that the ac–voltage response exists only in the section of the bridge where the transport current produces a voltage drop. A photolithographically defined 60 μm × 60 μm void in a 300 μm–wide bridge was clearly visible in a RTSLM image giving the spatial resolution smaller than 60 μm. In addition, the void disturbs the transport current distribution beyond itself generating an elongated shape void of 64 μm × 85 μm with the longer side along the direction of current flow in the RTSLM image. Our results indicate that the RTSLM is a useful tool to investigate the transport current distribution in high temperature superconductors.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 689: Symposium E – Materials for High-Temperature Superconductor Technologies , 2001 , E8.35
Copyright
Copyright © Materials Research Society 2002

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References

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