Vortex dynamics in a type-II superconducting film and complex linear-response functions

Journal Article · Tue Dec 01 00:00:00 EST 1992 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.46.14662· OSTI ID:6988926

Clem, J R; Coffey, M W ^[1]

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1. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

The dynamics of interacting vortices in a type-II superconducting film responding to a distribution of currents parallel to the film is investigated. The nonlocality of vortex interactions is taken into account by use of an expansion in normal modes of the flux-line lattice and a wave-vector-dependent dynamical matrix. The theory is applied to obtain linear response functions including the complex mutual inductance and film impedance. For a particular geometry of driving current and pickup coil, the complex mutual inductance is calculated and it is shown that only longitudinal modes contribute to the measurable change in flux when pinning is absent or when it is represented as a linear restoring force acting the same way on each vortex. The configuration so described provides a sensitive means of studying vortex dynamics.

• DOE Contract Number: W-7405-ENG-82
• OSTI ID: 6988926
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 46:22; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
TYPE-II SUPERCONDUCTORS
RESPONSE FUNCTIONS
VORTEX FLOW
ELECTRIC IMPEDANCE
HIGH-TC SUPERCONDUCTORS
SUPERCONDUCTING FILMS
FILMS
FLUID FLOW
FUNCTIONS
IMPEDANCE
SUPERCONDUCTORS
665412* - Superconducting Devices- (1992-)
360207 - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)