Highly sensitive uncooled magnetometers:: State of the art. superconducting magnetic hybrid magnetometers, an alternative to SQUIDs?

被引:36
作者
Robbes, D
Dolabdjian, C
Saez, S
Monfort, Y
Kaiser, G
Ciureanu, P
机构
[1] ISMRA Univ Caen, UMR 6072, GREYC, Grp Rech Informat Image & Instrumentat, Caen, France
[2] Inst Luft & Kaltetech, Fachbereich Kryotech, D-01309 Dresden, Germany
[3] Ecole Polytech, Engn Phys & Mat Engn Dept, Stn CV, Montreal, PQ H3C 3A7, Canada
关键词
sensors; magnetometers;
D O I
10.1109/77.919423
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
We discuss the performances of highly sensitive magnetometers using flux gates, as well as magnetotransport effects (magnetoresistance-AMR/GMR and magnetoimpedance-GMI), Soft magnetic materials operating at room temperature or cryogenic temperatures are involved in these effects. We report on their performances (sensitivity, bandwidth, etc.) with emphasis on their noise properties. The latter often fall to 1 - 10 pT/root Hz even for active areas as low as 1 - 2 mm(2). Amorphous magnetic flux guides are often used to enhance the field sensitivity of micro-devices. Their replacement by superconducting concentrators, which could lead to much larger gain factors, is discussed. This review, together with new results, confirms a new research held which could lead to highly sensitive, low noise, superconducting-magnetic hybrid magnetometers.
引用
收藏
页码:629 / 634
页数:6
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