High-Tc ramp-type Josephson junctions with a continually graded Y1-xPrxBa2Cu3Oy barrier

被引：7

作者：

Gao, J ^{[1
]}

Sun, JL ^{[1
]}

So, SM ^{[1
]}

Tang, WH ^{[1
]}

Li, TK ^{[1
]}

机构：

[1] Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2001年 / 79卷 / 19期

关键词：

D O I：

10.1063/1.1414295

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

High-T-c Josephson junctions with a graded barrier have been prepared by using a composite target. Such a barrier is synthesized by utilizing Y1-xPrxBa2Cu3Oy with a continually graded concentration of Pr, in which no lattice mismatch and other incompatible problems take place. The structural interfaces are absent in the weak link region and Josephson coupling occurs at the naturally formed superconducting/normal interfaces within the Y1-xPrxBa2Cu3Oy layer. Thus, it can significantly enhance the reproducibilty and performance of these junctions. The temperature dependences of the barrier thickness and Josephson were also studied.(C) 2001 American Institute of Physics.

引用

页码：3101 / 3103

页数：3

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