Boundary Current and Modulated Flux Motion in Superconducting Thin Pb Films
If a constant homogeneous magnetic field H is applied along the normal of a superconducting thin film carrying an rf current J an oscillatory flux motion results in the direction perpendicular to both H and J. We have recently reported the results of an experiment designed to study the effects of an additional weak modulating magnetic field on the flux motion at microwave frequencies.1 We found that the electric field E associated with the flux motion driven by J can be amplitude modulated. The purpose of the present paper is to describe briefly the salient features of this phenomenon at microwave frequencies and to report the results of recent experiments examining its dependence on the frequency of the rf current.
KeywordsMicrowave Frequency Boundary Current Constant Magnetic Field Modulation Component Flux Lattice
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