Next Article in Journal
Fast, Highly-Sensitive, and Wide-Dynamic-Range Interdigitated Capacitor Glucose Biosensor Using Solvatochromic Dye-Containing Sensing Membrane
Next Article in Special Issue
SVD-Based Technique for Interference Cancellation and Noise Reduction in NMR Measurement of Time-Dependent Magnetic Fields
Previous Article in Journal
A Layered Approach for Robust Spatial Virtual Human Pose Reconstruction Using a Still Image
Previous Article in Special Issue
A Novel Method of Multi-Information Acquisition for Electromagnetic Flow Meters
Article Menu

Export Article

Open AccessArticle
Sensors 2016, 16(2), 262; doi:10.3390/s16020262

Sensitivity Enhancement in Magnetic Sensors Based on Ferroelectric-Bimorphs and Multiferroic Composites

1
Physics Department, Oakland University, Rochester, MI 48309, USA
2
Electrical and Computer Engineering Department, Oakland University, Rochester, MI 48309, USA
3
Institute for Information Systems, Novgorod State University, Veiky Novgorod 173003, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Andreas Hütten
Received: 11 January 2016 / Revised: 13 February 2016 / Accepted: 16 February 2016 / Published: 20 February 2016
(This article belongs to the Special Issue Magnetic Sensor Device-Part 1)
View Full-Text   |   Download PDF [1095 KB, uploaded 22 February 2016]   |  

Abstract

Multiferroic composites with ferromagnetic and ferroelectric phases have been studied in recent years for use as sensors of AC and DC magnetic fields. Their operation is based on magneto-electric (ME) coupling between the electric and magnetic subsystems and is mediated by mechanical strain. Such sensors for AC magnetic fields require a bias magnetic field to achieve pT-sensitivity. Novel magnetic sensors with a permanent magnet proof mass, either on a ferroelectric bimorph or a ferromagnetic-ferroelectric composite, are discussed. In both types, the interaction between the applied AC magnetic field and remnant magnetization of the magnet results in a mechanical strain and a voltage response in the ferroelectric. Our studies have been performed on sensors with a Nd-Fe-B permanent magnet proof mass on (i) a bimorph of oppositely-poled lead zirconate titanate (PZT) platelets and (ii) a layered multiferroic composite of PZT-Metglas-Ni. The sensors have been characterized in terms of sensitivity and equivalent magnetic noise N. Noise N in both type of sensors is on the order of 200 pT/√Hz at 1 Hz, a factor of 10 improvement compared to multiferroic sensors without a proof mass. When the AC magnetic field is applied at the bending resonance for the bimorph, the measured N ≈ 700 pT/√Hz. We discuss models based on magneto-electro-mechanical coupling at low frequency and bending resonance in the sensors and theoretical estimates of ME voltage coefficients are in very good agreement with the data. View Full-Text
Keywords: magnetic sensor; piezoelectric; ferroelectric; multiferroic; bimorph; bending resonance; proof mass; permanent magnet magnetic sensor; piezoelectric; ferroelectric; multiferroic; bimorph; bending resonance; proof mass; permanent magnet
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Sreenivasulu, G.; Qu, P.; Petrov, V.; Qu, H.; Srinivasan, G. Sensitivity Enhancement in Magnetic Sensors Based on Ferroelectric-Bimorphs and Multiferroic Composites. Sensors 2016, 16, 262.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top