Enhanced Sensitivity of Magnetoelectric Sensors by Tuning the Resonant Frequency

Abstract

The sensitivity of magnetoelectric (ME) sensors is more than an order of magnitude higher at their mechanical resonant frequency fr. By applying a restoring torque to an asymmetric ME sensor, we have increased its effective stiffness and, thus, fr by 20% while maintaining the enhanced sensitivity at resonance. The torque was dependent on both the tensile force from a suspended weight and the length of the wire attaching it. This provides two alternative routes for tuning fr to optimize performance. We have detected fields below 10 pT at both the shifted and unshifted fr of 132.2 Hz.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2011
Accession Number
ADA573115

Entities

People

  • Alan S. Edelstein
  • G. Sreenivasulu
  • Gopalan Srinivasan
  • Jonathan Fine
  • Jonathan R. Petrie
  • Sanjay Mandal

Organizations

  • Oakland University

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Amplifiers
  • Amplitude
  • Analyzers
  • Detection
  • Detectors
  • Frequency
  • Geometry
  • Inverse Magnetoelastic Effects
  • Lead Zirconate Titanates
  • Magnetic Detectors
  • Magnetic Fields
  • Magnetic Properties
  • Power Spectra
  • Resonance
  • Resonant Frequency
  • Spectra
  • Spectrum Analyzers

Fields of Study

  • Physics

Readers

  • Mathematics or Statistics
  • Mechanical Engineering/Mechanics of Materials.
  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.