Field and current distributions and ac losses in superconducting strips

TitleField and current distributions and ac losses in superconducting strips
Publication TypeJournal Article
Year of Publication2009
AuthorsClem JR
Journal TitlePhysical Review B
Volume80
Pages184517
Date Published11/01
ISBN Number1098-0121
Accession NumberISI:000272310900105
Keywordsconductors, critical current density (superconductivity), eddy current losses, films, magnetic flux, superconducting thin films, TRANSPORT CURRENTS, type ii superconductors
Abstract

In this paper I discuss analytic and numerical calculations of the magnetic-field and sheet-current distributions in superconducting strips of width 2a and arbitrary thickness 2b at the center when the cross-section is an ellipse, a rectangle, and a shape intermediate between these limits. Using critical-state theory, I use several methods to determine the functional dependence of the ac transport-current losses upon F=I/I-c, where I is the peak alternating current and I-c is the critical current, and I discuss how this dependence can be affected by the cross-sectional shape, aspect ratio, and a flux-density-dependent critical current density J(c)(B).

URL<Go to ISI>://000272310900105
DOI10.1103/Physrevb.80.184517