Modeling nonlinearity and hysteresis due to critical-state flux penetration in hard superconductors
T. Dasgupta, Durga P. Choudhury, S. Sridhar
Abstract
The nonlinear surface impedance of a thin superconducting strip carrying a microwave current has been calculated numerically from first principles based upon flux penetration due to a current-induced critical state. The calculations approach analytic results in the appropriate limit. The technique is useful for design of passive superconducting microwave circuits.
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