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Self-fields in thin superconducting tapes: Implications for the thickness effect in coated conductors

Source: Appl. Phys. Lett. 96, 072510 (2010); doi:10.1063/1.3315893

Published 18 February 2010

KEYWORDS and PACS
Keywords
PACS
  • 74.78.-w
    Superconducting films and low-dimensional structures
  • 74.81.-g
    Inhomogeneous superconductors and superconducting systems
  • 74.72.-h
    Cuprate superconductors
  • 84.71.Mn
    Superconducting wires, fibers, and tapes
  • 74.25.Sv
    Critical currents in superconductors
  • YEAR: 2010
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PUBLICATION DATA
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Alvaro Sanchez,1 Carles Navau,1 Nuria Del-Valle,1 Du-Xing Chen,1,2 and John R. Clem3
1Departament de Física, Universitat Autònoma de Barcelona, Bellaterra, Barcelona, Catalonia 08193, Spain
2ICREA, Passeig Lluís Companys, 23, Barcelona, Catalonia 08010, Spain
3Department of Physics and Astronomy and Ames Laboratory, Iowa State University, Ames, Iowa 50011-3160, USA
A large decrease in transport current density has been observed in high-temperature superconducting films for increasing film thickness. In this work we theoretically explain the nature and the ubiquitous presence of this so-called thickness effect by analyzing the self-field created by the transport currents in the superconductor, assuming a realistic field-dependent critical-current density Jc. This knowledge can help in finding ways to improve transport current in superconducting films. ©2010 American Institute of Physics
History: Received 12 January 2010; accepted 20 January 2010; published 18 February 2010
Permalink: http://link.aip.org/link/?APPLAB/96/072510/1

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