Optimizing the flux coupling between a nanoSQUID and a magnetic particle using atomic force microscope nanolithography

被引：19

作者：

Faucher, M. ^{[1
,2
]}

Jubert, P. O. ^{[1
,2
]}

Fruchart, O. ^{[1
,2
]}

Wernsdorfer, W. ^{[1
,2
]}

Bouchiat, V. ^{[1
,2
]}

机构：

[1] CNRS, Inst Neel, F-38042 Grenoble 9, France

[2] Univ Grenoble 1, F-38042 Grenoble 9, France

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2009年 / 22卷 / 06期

关键词：

ROOM-TEMPERATURE; NIOBIUM; OXIDATION; DEVICES;

D O I：

10.1088/0953-2048/22/6/064010

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present results of niobium based SQUID magnetometers for which the weak links are engineered by the local oxidation of thin films using an atomic force microscope (AFM). Firstly, we show that this technique allows the creation of variable thickness bridges with 10 nm lateral resolution. Precise control of the weak link milling is offered by the possibility to monitor, in real-time, the weak link conductance. Such a process is shown to enhance the magnetic field modulation and hence the sensitivity of the magnetometer. Secondly, AFM lithography is used to provide a precise alignment of nanoSQUID weak links with respect to a ferromagnetic iron dot. The magnetization switching of the near-field coupled particle is studied as a function of the applied magnetic field direction.

引用

页数：5

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