YBA2CU3O7-DELTA/AU/NB SANDWICH GEOMETRY SNS WEAK LINKS ON C-AXIS ORIENTED YBA2CU3O7-DELTA

被引：5

作者：

FOOTE, MC

HUNT, BD

BAJUK, LJ

机构：

[1] Center For Space Microelectronics Technology, Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109

来源：

IEEE TRANSACTIONS ON MAGNETICS | 1991年 / 27卷 / 02期

基金：

美国国家航空航天局;

关键词：

D O I：

10.1109/20.133973

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：

Sandwich geometry superconductor/normal metal/superconductor structures have been fabricated on LaAlO3 and cubic zirconia with laser ablated, c-axis oriented YBa2Cu3O7-delta base electrodes, 100-600 angstrom of Au, and Nb counter electrodes, all formed in-situ without breaking vacuum. Junctions range in size from 5 to 20 mu-m on a side. Four probe I-V measurements at 4.2 K show R(n)A products as low as 6x10(-9) OMEGA-cm2 and critical current densities up to 5.2 kA/cm2. AC Josephson steps were observed with the application of 10 GHz radiation. The best results were obtained when the devices were annealed at approximately450 degrees-C in O2 for 30 minutes after Au deposition.

引用

页码：1335 / 1337

页数：3

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