A novel AMR magnetic sensor utilizing nanoscale magnetic-domain transformation

Y. Chen, P. Yeh, T. Chung

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Nano/Micro-scale magnetic sensors have been comprehensively investigated in recent decades. Among these sensors, anisotropic magnetoresistive (AMR) magnetic sensors have been well known for its simple and compact configuration. Recently, some researchers demonstrated that the magnetoresistance of a magnetic nanobar array can be changed by applying an external magnetic field orthogonal to the nanobar [1]. However, the changing-ratio of the magnetoresistance is small when the applied magnetic field is low. To address this issue, many researchers demonstrated that the magnetoresistance changing-ratio can be significantly increased by changing the geometry of the magnetic structures (such as patterning the magnetic structures into disk- and oval- shapes to reduce the magnetic anisotropy to increase MR changing-ratio)[2]. In addition, some researchers recently studied that changing the dimension of the magnetic disk- and oval- structures (through size-effect) can significantly transform the magnetic domain into a stripe, vortex, or single domain[3],[4] and changing the iteration can influence the magnetic-domain interaction in the magnetic disk- and oval- arrays [5]. According to these results, we believe these concepts (changing the geometry, dimension, and iteration of the domain array) can be modified and combined to demonstrate a significant magnetoresistance change through the nanoscale magnetic-domain transformation among stripe, vortex, and single domains. Hence, in this article, we present a novel AMR magnetic sensor utilizing the nanoscale magnetic stripe/vortex/single domain transformation.

Original languageEnglish
Title of host publication2015 IEEE International Magnetics Conference, INTERMAG 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479973224
DOIs
StatePublished - 14 Jul 2015
Event2015 IEEE International Magnetics Conference, INTERMAG 2015 - Beijing, China
Duration: 11 May 201515 May 2015

Publication series

Name2015 IEEE International Magnetics Conference, INTERMAG 2015

Conference

Conference2015 IEEE International Magnetics Conference, INTERMAG 2015
CountryChina
CityBeijing
Period11/05/1515/05/15

Fingerprint Dive into the research topics of 'A novel AMR magnetic sensor utilizing nanoscale magnetic-domain transformation'. Together they form a unique fingerprint.

  • Cite this

    Chen, Y., Yeh, P., & Chung, T. (2015). A novel AMR magnetic sensor utilizing nanoscale magnetic-domain transformation. In 2015 IEEE International Magnetics Conference, INTERMAG 2015 [7157131] (2015 IEEE International Magnetics Conference, INTERMAG 2015). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/INTMAG.2015.7157131