eprintid: 3346
rev_number: 12
eprint_status: archive
userid: 333
dir: disk0/00/00/33/46
datestamp: 2018-12-19 09:39:41
lastmod: 2018-12-21 01:10:56
status_changed: 2018-12-19 09:39:41
type: article
metadata_visibility: show
creators_name: Bui, Dinh Tu
creators_name: Le, Khac Quynh
creators_name: Nguyen, Huu Duc
creators_name: Do, Thi Huong Giang
creators_name: Phung, Anh Tuan
creators_name: Tran, Thi Dung
creators_name: Cao, Viet Anh
creators_id: buidinhtu@vnu.edu.vn
creators_id: quynhlk@gmail.com
creators_id: ducnh@vnu.edu.vn
creators_id: giangdth@vnu.edu.vn
title: Design Optimization of an Anisotropic Magnetoresistance Sensor for Detection of Magnetic Nanoparticles
ispublished: pub
subjects: Phys
divisions: fac_physic
abstract: Recent studies have shown that the magnetic field sensitivity of an anisotropic
magnetoresistance (AMR) sensor using a single-layer Ni80Fe20 thin film can be
considerably improved by increasing the shape anisotropy of the film. In this
work, an effective approach for improving the sensitivity and reducing the
magnetic coercive field as well as the thermal noise contribution in an AMR
Wheatstone bridge sensor is proposed by combining multiple resistors in the
series–parallel combination circuits. Four different AMR sensor designs,
consisting of a single resistor, three and five resistors in series and six resistors
in series–parallel connection, were fabricated by using Ta (10 nm)/Ni80Fe20 (5 nm)/Ta (10 nm) films grown on thermally oxidized Si substrates under the presence and the absence of a biasing magnetic field (900 Oe). The results showed that the sensors based on series–parallel combination gain a magnetic sensitivity (SH) 1.72 times higher than that of the sensor based on the series connection. This optimized sensor has improved the capacity of detecting various oncentrations of magnetic nanoparticles with a detection limit of magnetic moments estimated to be about 0.56 microemu
date: 2018
date_type: published
full_text_status: public
publication: Journal of Electronic Materials
refereed: TRUE
issn: 0361-5235
funders: Vietnam National University, Hanoi
projects: QG 16.26
projects: QG16.28
citation:   Bui, Dinh Tu and Le, Khac Quynh and Nguyen, Huu Duc and Do, Thi Huong Giang and Phung, Anh Tuan and Tran, Thi Dung and Cao, Viet Anh  (2018) Design Optimization of an Anisotropic Magnetoresistance Sensor for Detection of Magnetic Nanoparticles.  Journal of Electronic Materials .    ISSN 0361-5235     
document_url: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3346/1/10.1007_s11664-018-6822-4.pdf