Field and current distributions and ac losses in superconducting strips
|Title||Field and current distributions and ac losses in superconducting strips|
|Publication Type||Journal Article|
|Year of Publication||2009|
|Journal Title||Physical Review B|
|Keywords||conductors, critical current density (superconductivity), eddy current losses, films, magnetic flux, superconducting thin films, TRANSPORT CURRENTS, type ii superconductors|
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|