VNU-UET Repository

Detection of magnetic nanoparticles using simple AMR sensors in Wheatstone bridge

Khac Quynh Le and Dinh Tu Bui and Xuan Dang Dang and Quoc Viet Dong and Thi Hien Le and Thi Huong Giang Do and Huu Duc Nguyen (2016) Detection of magnetic nanoparticles using simple AMR sensors in Wheatstone bridge. Journal of Science: Advanced Materials and Devices, 1 . pp. 98-102.

[img] PDF
1MB

Official URL: http://www.journals.elsevier.com/journal-of-scienc...

Abstract

Wheatstone bridges incorporating a serially connected ensemble of simple AMR elements of Ni80Fe20 film were produced, targeting an application of a pinned magnetic field along the sensing magnetoresistor length. For the optimal dimension, the magnetoresistive element with length l 4 µm, width 150 µm and thickness 5 nm still shows a rather modest AMR ratio (of about 0.85% only). However, the resulting bridge exhibits a sensitivity as large as 2.15 mV/Oe. This is according to a standard sensitivity of 1.80 mV/V/Oe and a detection limit better than 10_6 emu, which is almost doubled with respect to that in the typical commercial AMR devices and is comparable with Permalloy based PHE sensor. This is suitable to detect the superparamagnetic fluid of 50 nm-Fe3O4-chitosan.

Item Type:Article
Subjects:Engineering Physics
ISI/Scopus-indexed journals
Divisions:Faculty of Engineering Physics and Nanotechnology (FEPN)
ID Code:2211
Deposited By: Lê Th� Hiên
Deposited On:31 Dec 2016 10:21
Last Modified:31 Dec 2016 10:21

Repository Staff Only: item control page