Properties of Josephson junctions in the inhomogeneous magnetic field of a system of ferromagnetic particles

被引：15
|
作者：
Vdovichev, SN [1 ]
Gribkov, BA
Gusev, SA
Il'ichev, E
Klimov, AY
Nozdrin, YN
Pakhomov, GL
Rogov, VV
Stolz, R
Fraerman, AA
机构：
[1] Russian Acad Sci, Inst Phys Microstruct, Nizhnii Novgorod 603950, Russia
[2] Inst Phys High Technol, D-07702 Jena, Germany
来源：
JETP LETTERS | 2004年 / 80卷 / 10期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1134/1.1857273
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The effect of a system of ferromagnetic particles on the field-dependent critical current of a Josephson junction is experimentally studied for junctions of different geometries. For edge junctions, the effect of commensurability between the periodic magnetic field of the particles and the Josephson vortex lattice is observed. The effect manifests itself in additional maxima of the field-dependent critical current. For overlap junctions, giant (greater than sixfold) variations of the maximum critical current are observed depending on the magnetic state of the particles. The changes in the "Fraunhofer" pattern of the overlaped Josephson junctions are attributed to the formation of Abrikosov vortices due to the effect of uniformly magnetized particles. The effects revealed in the experiments can be used to analyze the inhomogeneous magnetic field of a system of submicron particles and to control the transport properties of Josephson junctions. (C) 2004 MAIK "Nauka/lnterperiodica".
引用
收藏
页码：651 / 654
页数：4
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