Magnetic field dependence of RF surface impedance

Author

Coffey, Mark W. ; Clem, John R.

Author_Institution

USDOE, Iowa State Univ., Ames, IA, USA

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2136

Lastpage

2139

Abstract

The surface impedance, Z_s, is calculated for type-II superconductors subjected to a static magnetic field and small-amplitude microwave radiation. A complex penetration depth is calculated by using a model of vortex dynamics including a linear pinning restoring force and a viscous drag force. The static magnetic field dependence of the surface resistance, R_s and the surface reactance, X_s, is found by examining the dependence of the complex penetration depth on the length scales for low-field penetration, pinning penetration, and flux-flow penetration. In turn, from R_s, the static magnetic field dependence of the rate of energy dissipation is found

Keywords

flux flow; flux pinning; penetration depth (superconductivity); surface conductivity; type II superconductors; RF surface impedance; complex penetration depth; energy dissipation; flux-flow penetration; length scales; linear pinning restoring force; low-field penetration; pinning penetration; small-amplitude microwave radiation; static magnetic field; surface reactance; surface resistance; type-II superconductors; viscous drag force; vortex dynamics; Conductors; Laboratories; Lattices; Magnetic field measurement; Magnetic fields; Physics; Radio frequency; Superconductivity; Surface impedance; Surface resistance;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133634

Filename

133634