LOW-NOISE, SINGLE-LAYER YBA2CU3O7-X DC-SQUID MAGNETOMETERS AT 77 K

被引：58

作者：

CANTOR, R

LEE, LP

TEEPE, M

VINETSKIY, V

LONGO, J

机构：

[1] Conductus, Inc., Sunnyvale, CA 94086

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1995年 / 5卷 / 02期

关键词：

D O I：

10.1109/77.403205

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 describe a low-noise de Superconducting QUantum Interference Device (SQUID) magnetometer that is fabricated from a single layer of YBa2Cu3O7-x on a 2 cm x 2 cm bicrystal substrate. The magnetometer design consists of a single-turn pickup loop that is directly coupled to a low inductance SQUID, Using conventional flux-locked loop electronics with bias current reversal, the white flux noise of several of these magnetometers operated at 77 K is observed to be as law as 2.2 mu Phi(0)/root Hz above 10 kHz, increasing to about 5.7 mu Phi(0)/root Hz at 1 Hz. The field-to-flux conversion efficiency is measured to be 4.6 nT/Phi(0), resulting in a white magnetic field noise of 10 fT/root Hz above 10 kHz, increasing to 26 fT/root Hz at 1 Hz.

引用

页码：2927 / 2930

页数：4

共 19 条

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