Multilayer superconducting devices made using biepitaxial grain boundary Josephson junctions in YBa2Cu3O7

Kookrin Char, M. S. Colclough, L. Lee, G. Zaharchuk

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

We will report advances in superconducting devices and circuits made using bi-epitaxial grain boundary Josephson junctions in YBa2Cu3O7. These bi-epitaxial grain boundary junctions are created at predetermined locations by controlling the in-plane epitaxy of YBa 2Cu3O7 with a seed layer and a buffer layer on a base layer. SQUIDs made from these junctions show modulation up to 88 K and their white noise level is at the theoretical limit. Complete magnetometers coupled with multi-turn flux transformers made using multi- layer technology have magnetic field sensitivity at 77 K sufficient to be useful for many applications. Our recent success in fabricating integrated SQUIDs by combining the SQUID and multi-turn flux transformer on a single substrate is described. Low level integrated circuits with tens of bi-epitaxial grain boundary Josephson junctions have been fabricated. The current status of these circuits is reported.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherPubl by Int Soc for Optical Engineering
Pages90-100
Number of pages11
ISBN (Print)0819407283, 9780819407283
DOIs
StatePublished - 1992
EventProgress in High-Temperature Superconducting Transistors and Other Devices II - San Jose, CA, USA
Duration: 12 Sep 199113 Sep 1991

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume1597
ISSN (Print)0277-786X

Conference

ConferenceProgress in High-Temperature Superconducting Transistors and Other Devices II
CitySan Jose, CA, USA
Period12/09/9113/09/91

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