Piezoelectric/magnetostrictive MEMS resonant sensor array for in-plane multi-axis magnetic field detection

  • Hoe Joon Kim
  • , Sibo Wang
  • , Changting Xu
  • , David Laughlin
  • , Jingxi Zhu
  • , Gianluca Piazza

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

13 Scopus citations

Abstract

This paper reports the demonstration of an array of piezoelectric/magnetostrictive micro electromechanical system (MEMS) magnetic resonant sensors (PM-MRS) for multi-axis magnetic field (H-field) detection. An array of 43 MHz aluminum nitride (AlN) piezoelectric resonators vibrating along different in-plane directions (θ) but coated with a magnetostrictive layer (Fe65.6Co9.4B25) with the same easy axis (EZ) exhibit unique mechanical/electrical responses as a function of the applied H-field and its direction, enabling a high resolution multi-axis H-field detection. The sensor design yields resonators with a high quality factor (Q ∼ 1500) and electromechanical coupling coefficient (kt2 ∼ 2%) - the highest value ever reported for an AlN PM-MRS. This sensor system paves the way for low power magnetometers that enables single-chip multi-axis H-field detection.

Original languageEnglish
Title of host publication2017 IEEE 30th International Conference on Micro Electro Mechanical Systems, MEMS 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages109-112
Number of pages4
ISBN (Electronic)9781509050789
DOIs
StatePublished - 23 Feb 2017
Event30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017 - Las Vegas, United States
Duration: 22 Jan 201726 Jan 2017

Publication series

NameProceedings of the IEEE International Conference on Micro Electro Mechanical Systems (MEMS)
ISSN (Print)1084-6999

Conference

Conference30th IEEE International Conference on Micro Electro Mechanical Systems, MEMS 2017
Country/TerritoryUnited States
CityLas Vegas
Period22/01/1726/01/17

Bibliographical note

Publisher Copyright:
© 2017 IEEE.

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