Preparation and properties of all high Tc SNS-type edge dc SQUIDs

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

Research output: Contribution to journalArticleAcademicpeer-review

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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 PrBa2 Cu3O. 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. The voltage modulation for various bias currents investigated at 4.2 K noise measurements were performed. Details on the fabrication and measurements are presented
Original languageEnglish
Pages (from-to)3062-3065
Number of pages6
JournalIEEE transactions on magnetics
Volume27
Issue number2
DOIs
Publication statusPublished - 1991

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