Magnetoelectric laminated composites of lead-free BSZT and magnetostrictive materials

S. H. Choy, N. Y. Chan, C. Y. Lo, H. L.W. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

A magnetostrictive-piezoelectric laminated composite has been developed by sandwiching a lead-free Sr modified BZT piezoelectric ceramic plate between two magnetostrictive materials plates polarized in the thickness direction. Two different magnetostrictive materials, Terfenol-D continuous fiber composite (TD-FC) and cobalt ferrite (CFO), were used to fabricate the ME composite laminates. The quasistatic magnetostrictive properties of the magnetostrictive samples were measured and the quasistatic (differential) strain coefficient d-{33}^{QS }) can be found. Lead-free magnetoelectric (ME) laminated composite has a good ME voltage sensitivity (ME v ) under a low magnetic bias field (H Bias ). The BSZT/TDFC laminate has ME v = 0.888 V/Oe at the resonance frequency of 119 kHz under a H Bias of 0.6 kOe. The BSZT/CFO laminate has ME v = 0.155 V/Oe at the resonance frequency of 204 kHz under a H Bias of 0.4 kOe. A prototype magnetic field sensor was fabricated and characterized under different frequency and different field strength. This work shows the potential of BSZT lead-free ceramics in magnetic field sensing application.

Original languageEnglish
Pages (from-to)102-108
Number of pages7
JournalJournal of Electroceramics
Volume31
Issue number1-2
DOIs
Publication statusPublished - 1 Oct 2013

Keywords

  • Fiber composites
  • Lead-free ceramics
  • Magnetoelectric

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering

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