Two-dimensional magnetic field dependence of Josephson current and resonant current steps at finite voltage of square shape superconducting tunnel junctions

被引：5

作者：

Nakayama, Akiyoshi ^{[1
]}

Abe, Susumu ^{[1
]}

Watanabe, Norimichi ^{[1
]}

机构：

[1] Kanagawa Univ, Fac Engn, Dept Elect & Informat Frontiers, Kanagawa Ku, Yokohama, Kanagawa 2218686, Japan

来源：

JOURNAL OF APPLIED PHYSICS | 2012年 / 111卷 / 11期

关键词：

QUANTUM INTERFERENCE DEVICES; MODULATION; BARRIER; SCAN;

D O I：

10.1063/1.4724340

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

In this article, modulation characteristics of Josephson current through square shape niobium/aluminum-oxide/niobium superconducting junction by two-dimensional scanning of external magnetic field have been studied. Two pairs of Helmholtz coils are controlled by two current sources with general purpose interface bus system to obtain the magnetic field dependence automatically. The distribution of Josephson current density inside the square junction area is obtained. The 2-D magnetic field dependences of the resonant current steps of the current-voltage characteristics of the Nb/Al-oxide/Nb tunnel junction have also been measured using the junction voltage as the parameter. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4724340]

引用

页数：6

共 23 条

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