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Physica C Superconductivity

A high-Tc L-band SQUID amplifier combined with superconductive thin-film filters

Alexei Kalabukhov, Michael A. Tarasov, Е. А. Степанцов, Spartak Gevorgian, A. Deleniv, Z. G. Ivanov, Oleg V. Snigirev, Orest G. Vendik, Oleg A. Mukhanov

Published Mar 1, 2002• 5 citations
Publisher
DOI
10.1016/s0921-4534(01)01161-3

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The predominantly dx2−y2-pairing symmetry in most high-Tc superconductors provides the opportunity to fabricate Josephson junction circuits in which part of the junctions are biased by a phase difference of the superconducting order parameter of π. We present fabrication and measurements of an all high-Tc dc superconducting quantum interference device (dc SQUID) realized with thin-film technology, of which the Josephson junctions consist of one standard junction and one junction with a π-phase shift. The characteristics of the π-SQUID are compared with the properties of a standard high-Tc SQUID.