Properties of asymmetric high critical temperature dc SQUIDs

被引：4

作者：

Testa, G ^{[1
]}

Pagano, S ^{[1
]}

Sarnelli, E ^{[1
]}

Calidonna, CR ^{[1
]}

Furnari, MM ^{[1
]}

Russo, M ^{[1
]}

机构：

[1] CNR, Ist Cibernet, I-80072 Arco, Naples, Italy

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2001年 / 11卷 / 01期

关键词：

SQUIDs; Josephson junctions;

D O I：

10.1109/77.919492

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：

Asymmetries between the two Josephson junctions of a de-SQUID have always been considered undesirable spurious effects, responsible for the degradation of the device performance. However, it was recently demonstrated that a suitable choice of the asymmetric configuration can lead to magnetic flux noise values lower than symmetric ones, The numerical analysis was performed by using parameters typical of low-Tc SQUIDs, operating at the liquid helium temperature. In this paper,the analysis has been extended to high critical temperature de SQUIDs, operating at the liquid nitrogen temperature. Also in this case, asymmetric SQUIDs show the best performance in terms of both flux to voltage transfer coefficient V-phi and magnetic flux noise S-phi. In order to optimize the device performance, the dependence of SQUID properties on damping resistance and normalized SQUID inductance has been computed for both symmetric and asymmetric configurations.

引用

页码：908 / 911

页数：4

共 10 条

[1]

CLARKE J, 1995, SQUID SENSORS FUNDAM, P1

[2] EFFECT OF THERMAL NOISE ON THE CHARACTERISTICS OF A HIGH-TC SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE [J].