Operation of high-temperature superconductor magnetometer with submicrometer bicrystal junctions

被引：21
|
作者：
Faley, MI [1 ]
Poppe, U
Urban, K
Slobodchikov, VY
Maslennikov, YV
Gapelyuk, A
Sawitzki, B
Schirdewan, A
机构：
[1] Forschungszentrum Julich, Inst Festkorperforsch, D-52425 Julich, Germany
[2] Inst Radio Engn & Elect, Moscow 101999, Russia
[3] Franz Volhard Hosp, D-13125 Berlin, Germany
来源：
APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 13期
关键词：
D O I：
10.1063/1.1508419
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We investigated the noise properties of dc superconducting quantum interference device flip-chip magnetometers with submicrometer-wide bicrystal junctions operating at 77.4 K. The noise of the magnetometers with electronics was about 6 fT/rootHz at frequencies above 100 Hz increasing up to about 20 fT/rootHz at 1 Hz. The operation of the magnetometers was characterized in an electronic axial first order gradiometer system, which was employed for biomagnetic measurements. The system demonstrated a gradient resolution of about 1 fT/cmrootHz at 77.4 K and stable operation in a standard magnetically shielded room under clinical conditions. (C) 2002 American Institute of Physics.
引用
收藏
页码：2406 / 2408
页数：3
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