Flux creep in Josephson junction arrays

Conference · Fri Mar 01 04:00:00 EST 1991 · IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States)

OSTI ID:5901702

Pace, S; Saggese, A; DeLuca, R ^[1]; Celani, F; Liberatori, L ^[2]

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1. Dept. of Physics, Univ. of Salerno, 84100 Salerno (IT)
2. INFN-LNF, 00044 Frascati (IT)

This paper reports that, in order to analyze the diamagnetic properties of weakly coupled structures in high T{sub c} ceramic superconductors, the Josephson junction array model is used. The authors suppose that the coupling is strong enough to allow magnetic flux trappings inside non superconducting regions surrounded by superconducting loops closed by Josephson junctions. The authors remark that the presence of currents flowing through the junctions has to be taken explicitly into account in the Hamiltonian. This description leads to a creep model of the Josephson junction array. Indeed the authors have: pinning centers generated by non superconducting regions into the loops, pinning potentials determined by fluxon motion barriers due to the Josephson junctions, absence of degeneracy of the states corresponding to a different number of fluxons in the loops, a reduction of the barrier height due to measuring currents or to diamagnetic shielding currents.

• OSTI ID: 5901702
• Report Number(s): CONF-900944--
• Conference Information: Journal Name: IEEE Transactions on Magnetics (Institute of Electrical and Electronics Engineers); (United States) Journal Volume: 27:2
• Country of Publication: United States
• Language: English

Related Subjects

665411* -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DIAMAGNETISM
HAMILTONIANS
HIGH-TC SUPERCONDUCTORS
JOSEPHSON JUNCTIONS
JUNCTIONS
LORENTZ FORCE
MAGNETIC FLUX
MAGNETISM
MATHEMATICAL MODELS
MATHEMATICAL OPERATORS
QUANTUM OPERATORS
SUPERCONDUCTING JUNCTIONS
SUPERCONDUCTORS
TYPE-II SUPERCONDUCTORS