Controlled preparation of all high Tc SNS-type edge junctions and DC-SQUIDs

J. Gao, W.A.M. Aarnink, G.J. Gerritsma, H. Rogalla

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133 Citations (Scopus)
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Abstract

High-Tc SNS-type Josephson junctions and DC SQUIDs were successfully fabricated using hetero-epitaxially grown multilayers of YBa2Cu3Ox and PrBa2Cu3Ox. These layers are c-axis oriented and hence edges of the multilayers give rise to a current flow in the ab-plane between the electrodes of a Josephson junction. The necessary structuring was done by Ar ion beam etching. The individual junctions exhibit a supercurrent up to 80 K. The IcRn-product of these junctions usually has a lower limit of 8 mV at 4.2 K. Voltage modulation of the first DC SQUIDs can be observed up to 66 K. Details on the fabrication and measurements are presented.
Original languageEnglish
Pages (from-to)126-130
Number of pages5
JournalPhysica C
Volume171
Issue number1-2
DOIs
Publication statusPublished - 1990

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