Mechanism for the peak effect of critical current in superconducting multilayers

Saburo Takahashi; Toshio Hirai; Masashi Tachiki

doi:10.1117/12.179154

29 June 1994 Mechanism for the peak effect of critical current in superconducting multilayers

Saburo Takahashi, Toshio Hirai, Masashi Tachiki

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179154
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

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.

Citation Download Citation

Saburo Takahashi, Toshio Hirai, and Masashi Tachiki "Mechanism for the peak effect of critical current in superconducting multilayers", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179154

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