Parallel and perpendicular field investigations of coupled high-Tc multilayer structures

Patrice Fivat; Jean-Marc Triscone; M. Andersson; Michel Decroux; Oystein Fischer

doi:10.1117/12.179158

29 June 1994 Parallel and perpendicular field investigations of coupled high-T_c multilayer structures

Patrice Fivat, Jean-Marc Triscone, M. Andersson, Michel Decroux, Oystein Fischer

Proceedings Volume 2157, Superconducting Superlattices and Multilayers; (1994) https://doi.org/10.1117/12.179158
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

We report on the behavior of high T_c superconductors coupled multilayer structures in magnetic field parallel and perpendicular to the ab plane. These structures consist of N 24 angstroms thick DyBa₂Cu₃O₇ layers, each separated from the next by 96 angstroms of an (formula available in paper) alloy. This alloy allows a coupling of the superconducting layers as demonstrated by measurements of the activation energies for flux motion U. For a N equals 15 sample one finds, in perpendicular fields, that a correlated motion of pancake vortices occurs with a characteristic length of about 480 angstroms. Additionally, U is found to be proportional to logB at low fields while at higher fields a power law behavior is observed. In parallel field we find U to be field independent up to 1 T, suggesting that the vortices are trapped at low fields in the material where weak superconductivity is induced by proximity effect.

Citation Download Citation

Patrice Fivat, Jean-Marc Triscone, M. Andersson, Michel Decroux, and Oystein Fischer "Parallel and perpendicular field investigations of coupled high-T_c multilayer structures", Proc. SPIE 2157, Superconducting Superlattices and Multilayers, (29 June 1994); https://doi.org/10.1117/12.179158

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