Abstract
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.
Original language | English |
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Pages (from-to) | 4331-4333 |
Number of pages | 3 |
Journal | Physical Review B |
Volume | 49 |
Issue number | 6 |
DOIs | |
State | Published - 1994 |
Externally published | Yes |