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Proceedings Paper

Spontaneous currents in superconductor/ferromagnetic devices
Author(s): Zoran Radovic; Ljiljana Dobrosavljevic-Grujic; B. Vujicic
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Paper Abstract

We study theoretically the Josephson coupling in a ferromagnetic weak link between both isotropic s-wave, and layered d-wave superconductors. For strong ferromagnetic barrier influence, the conventional coupling is obtained, with ground state phase difference across the link 0 < (phi) gs <EQ (pi) . When the weak link is a part of a superconducting ring, this is accompanied by the flow of spontaneous supercurrent, of intensity which depends on the reduced inductance l equals 2(pi) LIc(T)/(Phi) 0, and is non-zero only for l greater than a critical value. For l >> 1, another consequence of the unconventional coupling is the anomalous quantization of the magnetic flux.

Paper Details

Date Published: 6 September 2000
PDF: 10 pages
Proc. SPIE 4058, Superconducting and Related Oxides: Physics and Nanoengineering IV, (6 September 2000); doi: 10.1117/12.397826
Show Author Affiliations
Zoran Radovic, Univ. of Belgrade (Serbia)
Ljiljana Dobrosavljevic-Grujic, Institute of Physics (Serbia)
B. Vujicic, Univ. of Montenegro (FR Yugoslavia)

Published in SPIE Proceedings Vol. 4058:
Superconducting and Related Oxides: Physics and Nanoengineering IV
Davor Pavuna; Ivan Bozovic, Editor(s)

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