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Superconducting Thallium Oxide and Mercury Oxide Films

Published online by Cambridge University Press:  18 March 2011

Raghu N. Bhattacharya
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
S. L. Yan
Affiliation:
Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, U.S.A.
Zhongwen Xing
Affiliation:
Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, U.S.A.
Yiyuan Xie
Affiliation:
Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, U.S.A.
Judy Z. Wu
Affiliation:
Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045, U.S.A.
Matt Feldmann
Affiliation:
Applied Superconductivity Center, University of Wisconsin, Madison, WI 53706, U.S.A.
Jun Chen
Affiliation:
Boston College, Department of Physics, Chestnut Hill, Boston, MA 02467, U.S.A.
Qihua Xiong
Affiliation:
Boston College, Department of Physics, Chestnut Hill, Boston, MA 02467, U.S.A.
Z. F. Ren
Affiliation:
Boston College, Department of Physics, Chestnut Hill, Boston, MA 02467, U.S.A.
Richard D. Blaugher
Affiliation:
National Renewable Energy Laboratory, Golden, CO 80401, U.S.A.
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Abstract

Previously we reported on a two-layer electrodeposition process of thallium oxide superconductors that showed transport critical current density above 106 A/cm2 at 77 K in zero field. In this article, we report our effort to convert an electrodeposited thick film of (Tl,Bi,Pb)2(Sr,Ba)2Ca1Cu2Ox to (Hg,Bi,Pb)2(Sr,Ba)2Ca1Cu2Ox by the cation-exchange process. We are also reporting magneto-optical imaging data on Tl oxide superconductor films, which are compared with YBCO. Magneto-optical imaging provides insight into the nature of current flow in the Tl oxide superconductor, and thus, will help us to improve the critical current density in bulk high-temperature superconductor wire or tape.

Type
Research Article
Copyright
Copyright © Materials Research Society 2001

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References

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