Magnetic-field dependence of the surface impedance in the mixed state of type-II superconductors

V. A. Berezin; E. V. Il’ichev; V. A. Tulin; E. B. Sonin; A. K. Tagantsev; K. B. Traito

doi:10.1103/PhysRevB.49.4331

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Magnetic-field dependence of the surface impedance in the mixed state of type-II superconductors

V. A. Berezin, E. V. Il’ichev, V. A. Tulin, E. B. Sonin, A. K. Tagantsev, K. B. Traito

DOI 10.1103/PhysRevB.49.4331 · Physical Review B

T1

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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.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
In0.19Pb0.81 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown