Low excess flux noise in YBa2Cu3O7-x dc SQUIDs cooled in static magnetic fields

被引：4

作者：

Dantsker, E ^{[1
]}

Tanaka, S ^{[1
]}

Nilsson, PA ^{[1
]}

Kleiner, R ^{[1
]}

Clarke, J ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 1997年 / 7卷 / 02期

关键词：

D O I：

10.1109/77.621812

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 have investigated the effect of device geometry on the excess low frequency 1/f noise of thin-film YBCO dc SQUIDS cooled in static magnetic fields. The key factor in eliminating this noise is the reduction of the linewidth of the SQUID loop to a value below the average separation of the flux vortices. The spectral density of the flux noise in these devices was independence of cooling field up to 33 mu T in the best case. Estimates indicate that incorporating this device into a directly-coupled magnetometer would not increase the noise further.

引用

页码：2772 / 2775

页数：4

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