Journal article

Magnetic-Field Dependence of the Surface Impedance in the Mixed-State of Type-Ii Superconductors

The surface impedance of type-II superconductors in the mixed state has been measured as a function of the magnetic field in the low-frequency limit. At the low magnetic fields close to the lower critical field the surface impedance was observed to be proportional to the vortex density, whereas at higher fields a crossover to the square-root dependence on the vortex density was observed. This behavior agrees with the two-mode electrodynamics in which the penetration of electromagnetic fields into the superconductor in the mixed state is governed by two space scales: (i) the skin-layer width, and (ii) the screening length of the order of the intervortex distance arising from the elasticity of the vortex array.

    Keywords: penetration ; dissipation


    Berezin, Va Iptm,Chernogolovka 142432,Russia Af Ioffe Phys Tech Inst,St Petersburg 194021,Russia


    Times Cited:10

    Cited References Count:18


    Record created on 2006-08-21, modified on 2016-08-08


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