WHITE-NOISE PERFORMANCE OF INTEGRATED DC-SQUID SUSCEPTOMETERS IN HIGH MAGNETIC-FIELDS

被引：4

作者：

STAWIASZ, KG ^{[1
]}

KETCHEN, MB ^{[1
]}

NARASIMHAN, LR ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES,DEPT PHYS,LOS ANGELES,CA 90024

来源：

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

关键词：

D O I：

10.1109/77.403279

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 characterized the white noise performance of integrated DC SQUID susceptometers in magnetic fields up to 400 G. The field is applied in the plane of the tunnel junctions and pickup loops. For 1 mu m diameter junctions, the noise does not increase significantly as the field is increased to 125 G. Further increase of the applied field results in higher noise until approximately 200 G where the critical current of the junctions is at a minimum. The noise then improves to approximately 4 times the zero field value at the maximum of the first lobe of the single junction interference pattern. We have also measured the noise of a SQUID with 0.6 mu m junctions and found no increase up to 250 G.

引用

页码：3230 / 3232

页数：3

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