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Proceedings Paper

Mechanism for the peak effect of critical current in superconducting multilayers
Author(s): Saburo Takahashi; Toshio Hirai; Masashi Tachiki
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Paper Abstract

We theoretically study the vortex states in superconducting multilayers whose components are superconductors with nearly same transition temperatures but very different upper critical fields. We solve the nonlinear Ginzburg-Landau equations numerically for the vortex lattice state of the multilayers. Two kinds of different vortex lattice states appear between the lower and upper critical fields. From the free energy calculations, we determine the phase boundary between the two vortex lattice states and map a phase diagram in the H-T plane. The peak effect of the critical current observed in Nb/NbZr multilayers is discussed in connection with the vortex states in these multilayers.

Paper Details

Date Published: 29 June 1994
PDF: 9 pages
Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); doi: 10.1117/12.179154
Show Author Affiliations
Saburo Takahashi, Tohoku Univ. (Japan)
Toshio Hirai, Tohoku Univ. (Japan)
Masashi Tachiki, Tohoku Univ. (Japan)


Published in SPIE Proceedings Vol. 2157:
Superconducting Superlattices and Multilayers
Ivan Bozovic, Editor(s)

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