Detection of a micron-sized magnetic sphere using a ring-shaped anisotropic magnetoresistance-based sensor: A model for a magnetoresistance-based biosensor

被引：326

作者：

Miller, MM ^{[1
]}

Prinz, GA ^{[1
]}

Cheng, SF ^{[1
]}

Bounnak, S ^{[1
]}

机构：

[1] USN, Res Lab, Washington, DC 20375 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 12期

关键词：

Random access storage - Biosensors - Anisotropy - Binary alloys - Iron alloys;

D O I：

10.1063/1.1507832

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have fabricated micron-sized NiFe ring-shaped sensors that show localized detection of the radial component of the dipolar fringing field from a single, partially magnetized, micron-sized NiFe sphere. Specifically, the anisotropic magnetoresistance response to this fringing field is strongly peaked when the sphere is directly above the center of the ring and rapidly decreases to zero when the sphere is outside the ring. Such a device is a model system for a proposed biosensor array architecture that could operate similarly to high-density random access computer memory.

引用

页码：2211 / 2213

页数：3

共 8 条

[1] A biosensor based on magnetoresistance technology [J].