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

Sanchez, Alvaro; Navau, Carles; Del-Valle, Nuria; Du-Xing Chen; Clem, John R.
February 2010
Applied Physics Letters;2/15/2010, Vol. 96 Issue 7, p072510
Academic Journal
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.


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