Phase sensitive experiments in ferromagnetic-based Josephson junctions

被引：99
|
作者：
Guichard, W
Aprili, M
Bourgeois, O
Kontos, T
Lesueur, J
Gandit, P
机构：
[1] CNRS, Ctr Rech Tres Basses Temp, F-38042 Grenoble, France
[2] Univ Paris 11, CNRS, CSNSM, F-91405 Orsay, France
[3] Ecole Super Phys & Chim Ind Ville Paris, F-75231 Paris, France
来源：
PHYSICAL REVIEW LETTERS | 2003年 / 90卷 / 16期
关键词：
D O I：
10.1103/PhysRevLett.90.167001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We have measured the ground state of ferromagnetic Josephson junctions using a single dc SQUID (superconducting quantum interference device).We show that the Josephson coupling is either positive (0 coupling) or negative (pi coupling) depending on the ferromagnetic layer thickness. As expected, the sign change of the Josephson coupling is observed as a shift of half a quantum flux in the SQUID diffraction pattern when operating in the linear limit.
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页数：4
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