Estimation of inductance for high-T-c dc-SQUID's in coplanar waveguide

被引：14

作者：

Fuke, H ^{[1
]}

Saitoh, K ^{[1
]}

Utagawa, T ^{[1
]}

Enomoto, Y ^{[1
]}

机构：

[1] ISTEC, SUPERCONDUCT RES LAB, KOTO KU, TOKYO 135, JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1996年 / 35卷 / 12A期

关键词：

SQUID; inductance value; single flux quantum; NdBa2Cu3Oy superconducting films; coplanar waveguide;

D O I：

10.1143/JJAP.35.L1582

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have investigated the electrical properties of high-T-c dc-SQUID's formed in a coplanar waveguide, and discussed their applicability to single flux quantum (SFQ) circuits, The planar type Josephson junctions were fabricated in NdBa2Cu3Oy (NBCO) superconducting thin films by a narrow-focused ion beam (FIB) irradiation technique. The critical current and normal resistance values of the Josephson junction at 4.2 K were 115 mu A and 8 Omega respectively, The inductance was estimated by applying a direct injection of the control current into the dc-SQUID loop and measuring the periodic voltage response, a loop inductance of 47 pH was obtained for a 25 mu m-wide and 20 mu m-long dc-SQUID at 4.2 K. It has been clarified that for a stable operation of SFQ logic circuits, a 10 mu m-square dc-SQUID's are required.

引用

页码：L1582 / L1584

页数：3

共 14 条

[1]

BARONE A, 1982, PHYSICS APPL JOSEPHS, P408

[2] INDUCTANCE MEASUREMENTS IN MULTILEVEL HIGH-T(C) STEP-EDGE GRAIN-BOUNDARY SQUIDS [J].