Localized detection of reversal nucleation generated by high moment magnetic nanoparticles using a large-area magnetic sensor

被引：18

作者：

Feng, Yinglong ^{[1
]}

Liu, Jinming ^{[1
]}

Klein, Todd ^{[1
]}

Wu, Kai ^{[1
]}

Wang, Jian-Ping ^{[1
]}

机构：

[1] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2017年 / 122卷 / 12期

基金：

美国国家科学基金会;

关键词：

SPIN-VALVE SENSORS; GIANT MAGNETORESISTIVE SENSORS; BIOLOGICAL APPLICATIONS; ULTRASENSITIVE DETECTION; ELECTRICAL DETECTION; DETECTION PLATFORM; ARRAYS; BIOSENSORS; EXCHANGE; SILICON;

D O I：

10.1063/1.5001919

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

This report introduces a local-magnetic-reversal-nucleation based giant magnetoresistance (GMR) sensor with a large sensing area and further discusses its novel sensing scheme of high magnetic moment nanoparticles (MNPs). We demonstrated experimentally that this large-area GMR sensor could successfully detect high moment MNPs. The detection scheme of localized reversal nucleation of GMR sensor induced by MNPs was analyzed and further confirmed by the micromagnetic simulations. This work may provide one pathway in designing next generation GMR biosensors with large area and high sensitivity. This sensing scheme could be applicable to other magnetic biosensors such as magnetic tunnel junction sensors and planar Hall sensors. Published by AIP Publishing.

引用

页数：8

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