High-Tc Superconducting Electronic Devices Based on YBCO Step-Edge Grain Boundary Junctions

Shane T. KEENAN  Jia DU  Emma E. MITCHELL  Simon K. H. LAM  John C. MACFARLANE  Chris J. LEWIS  Keith E. LESLIE  Cathy P. FOLEY  

IEICE TRANSACTIONS on Electronics   Vol.E96-C   No.3   pp.298-306
Publication Date: 2013/03/01
Online ISSN: 1745-1353
DOI: 10.1587/transele.E96.C.298
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on SQUID & its Applications)
Josephson junction,  grain boundary step edge junction,  high temperature superconductor,  SQUID,  THz imaging,  mineral exploration,  magnetic anomaly detection,  unexploded ordnance detection,  microwave devices,  

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We outline a number of high temperature superconducting Josephson junction-based devices including superconducting quantum interference devices (SQUIDs) developed for a wide range of applications including geophysical exploration, magnetic anomaly detection, terahertz (THz) imaging and microwave communications. All these devices are based on our patented technology for fabricating YBCO step-edge junction on MgO substrates. A key feature to the successful application of devices based on this technology is good stability, long term reliability, low noise and inherent flexibility of locating junctions anywhere on a substrate.