DC superconducting quantum interference devices with BiSrCaCuO bicrystal grain boundary junctions at 77K

被引：3

作者：

Takami, T ^{[1
]}

Kuroda, K ^{[1
]}

Tanimura, J ^{[1
]}

Kojima, K ^{[1
]}

Nunoshita, M ^{[1
]}

Hirota, M ^{[1
]}

机构：

[1] JAPAN DEF AGCY,RES CTR 5,KAWASAKI,KANAGAWA 216,JAPAN

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS | 1996年 / 35卷 / 3B期

关键词：

superconductor; grain boundary; bicrystal; SQUID; BiSrCaCuO; SrTiO3;

D O I：

10.1143/JJAP.35.L391

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed de superconducting quantum interference devices (SQUIDs) with grain boundary junctions of a BiSrCaCuO (BSCCO) thin film on a SrTiO3 (100) bicrystal substrate with a misorientation angle of 36.8 degrees. The T-c and J(c) of the BSCCO film were 93 K and 3 x 10(5) A/cm(2) at 77 K, respectively. These SQUIDs operated at 77 K. The I-V characteristics of the SQUIDs were of resistively shunted junction (RSJ) type. A SQUID with 20-mu m-wide junctions showed Fraunhofer-like Bur-voltage characteristics. The I(0)R(n) product and the modulation voltage of a SQUID with 10-mu m-wide junctions were 23 mu V and 6 mu V at 77 K, respectively. The flux noise measured in a flux-locked loop mode was 2.0 x 10(-5)Phi(0)/Hz(0.5) in the white noise region.

引用

页码：L391 / L393

页数：3

共 11 条

[1] THIN-FILM BI2SR2CACU2O8+X JOSEPHSON-JUNCTIONS AND DIRECT-CURRENT SUPERCONDUCTING QUANTUM INTERFERENCE DEVICES ON (001) SRTIO3 BICRYSTALS [J].