Dynamic magnetoelastic properties of epoxy-bonded Sm0.88Nd0.12Fe1.93pseudo-1-3 negative magnetostrictive particulate composite

Fang Yang, Chung Ming Leung, Siu Wing Or, Wei Liu, Zhidong Zhang, Yuan Feng Duan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Pseudo-1-3 negative magnetostrictive particulate composite is prepared by embedding and aligning light rare earth (Sm and Nd)-based negative magnetostrictive Sm0.88Nd0.12Fe1.93particles with randomly distributed sizes of 10-180 μm in a passive epoxy matrix using a particle volume fraction of0.5. The dynamic magnetoelastic properties of the composite are investigated as a function of both magnetic bias field and frequency under a constant magnetic drive field. The dynamic relative permeability (μr33T) exhibits a flat frequency response with no observable dispersion at all bias field levels, except for the fundamental shape resonance range of 40-50 kHz. The free (μr33T) and clamped (μr33T) relative permeabilities attain their maximum values at low bias field levels of ≤10 kA/m because of the relatively easy 180 domain-wall motion. The elastic modulus at constant magnetic field strength (E3H) and that at constant magnetic flux density (E3B) show a maximum negative-E effect, accompanying a maximum dynamic strain coefficient (d33) of -2 nm/A, at about 100 kA/m due to the maximum motion of non-180 domain walls.
Original languageEnglish
Article number07A940
JournalJournal of Applied Physics
Volume111
Issue number7
DOIs
Publication statusPublished - 1 Apr 2012

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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