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Content Provider | IEEE Xplore Digital Library |
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Author | Aytug, T. Paranthaman, M. Gapud, A.A. Kang, S. Varela, M. Martin, P.M. Raitano, J.M. Chan, S.-W. Thompson, J.R. Christen, D.K. |
Copyright Year | 2002 |
Abstract | We have demonstrated improved critical current density, Jc, in YBa2Cu3O7-delta (YBCO) films through a controlled study of substrate surface modifications with nano-sized second-phase pre-formed CeO2 particles. Nanoparticles were applied to single crystal SrTiO3 surfaces using suspension-based techniques prior to YBCO film growth. With the introduction of CeO2 nanoparticles, YBCO films showed more robust field dependence at intermediate fields (Jc prop B-prop), where a smaller power law exponent of alpha ~ 0.3 is obtained. The self-flefd Jc(77K, Bparc) values of the YBCO films on reference and CeO2 modified substrates are 1.1 and 1.9 MA/cm2 ; and at 1 Tesla 0.1 and 0.52 MA/cm2 , respectively. Consistent with this alpha-value, angular field dependent Jc and transmission electron microscopy studies indicate the presence of c-axis aligned correlated defects in these modified samples. |
Sponsorship | Council on Superconductivity Appl. Superconductivity Conference Inc MIT |
Starting Page | 3720 |
Ending Page | 3723 |
Page Count | 4 |
File Size | 846368 |
File Format | |
ISSN | 10518223 |
Volume Number | 17 |
Issue Number | 2 |
Language | English |
Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Publisher Date | 2007-06-01 |
Publisher Place | U.S.A. |
Access Restriction | One Nation One Subscription (ONOS) |
Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
Subject Keyword | Substrates Nanoparticles Yttrium barium copper oxide High temperature superconductors Flux pinning Physics Critical current density Magnetic fields Conducting materials Crystalline materials surface decoration Coated conductors flux pinning high temperature superconductivity nanoparticles |
Content Type | Text |
Resource Type | Article |
Subject | Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering |
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