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

页码：2406 / 2408

页数：3

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