Dynamic magnetoelastic properties of epoxy-bonded Terfenol-D particulate composite with a preferred [112] crystallographic orientation

Siu Wing Or, Gregory P. Carman

Research output: Journal article publicationJournal articleAcademic researchpeer-review

23 Citations (Scopus)

Abstract

The dynamic magnetoelastic properties of a [112]-oriented magnetostrictive composite comprising 0.49 volume fraction of needle-shaped, [112]-oriented Terfenol-D particles and Spurr epoxy were investigated as a function of magnetic bias field. These properties included elastic moduli (E3Hand E3B), dynamic strain coefficient (d33), and magnetoelastic coupling coefficient (k33). A randomly oriented composite with 0.51 volume fraction of irregular-shaped, ball-milled Terfenol-D particles was also prepared and characterized for comparison. It was found that the [112] preferential particulate orientation increases non-180° domain-wall motion in the [112]-oriented composite, resulting in maximum negative-ΔE, d33, and k33values of about 10%, 5.5 nm/A, and 0.34, respectively. These are the largest property values reported as yet for magnetostrictive particulate composites, being up to 67% larger than the randomly oriented composite and approach to 65% of the monolithic Terfenol-D.
Original languageEnglish
Pages (from-to)2790-2792
Number of pages3
JournalIEEE Transactions on Magnetics
Volume41
Issue number10
DOIs
Publication statusPublished - 1 Oct 2005

Keywords

  • [112] Crystallographic orientation
  • Domain-wall motion
  • Dynamic magnetoelastic properties
  • Magnetostrictive particulate composites
  • Terfenol-D

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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