Progress in high Tc magnetic sensors and their applications

Donaldson, G.B., Bowman, R.M., Cochran, A. , Kirk, K.J., Pegrum, C.M. and Macfarlane, J.C. (1992) Progress in high Tc magnetic sensors and their applications. Physica Scripta, T45, pp. 34-40. (doi: 10.1088/0031-8949/1992/T45/007)

Abstract

We report recent progress on the development of components needed for high Tc SQUID magnetic sensors, and on some of the early applications which are appearing or can be foreseen. The SNS type edge junction, and the step edge and biepitaxial grain boundary junction technologies are considered and we include details of our own YBCO device based on steps which are Ar ion-milled in MgO substrates. A review of applications prospects for these detectors will be given in the light of the available noise performance which for high Tc DC SQUIDs, at much less than 10−4 phgr0 Hz−1/2, is now better than for commercial low Tc RF SQUIDs. Illustrations are given from clinical biomagnetism and from non-destructive evaluation of conducting materials.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Cochran, Professor Sandy
• Authors: Donaldson, G.B., Bowman, R.M., Cochran, A., Kirk, K.J., Pegrum, C.M., and Macfarlane, J.C.
• College/School: College of Science and Engineering > School of Engineering > Systems Power and Energy
• Journal Name: Physica Scripta
• Publisher: IOP Publishing
• ISSN: 0031-8949
• ISSN (Online): 1402-4896