Magnetomechanical properties of epoxy-bonded (Tb0.3Dy0.7)1-xPrxFe1.55(0 ≤ x ≤ 0.4) pseudo-1-3 magnetostrictive composites

Xiangke Lv, Siu Wing Or, Wei Liu, Xionghua Liu, Zhidong Zhang

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13 Citations (Scopus)

Abstract

Pseudo-1-3 magnetostrictive composites consisting of stabilizer (B, Co)-free, light rare earth (Pr)-containing magnetostrictive (Tb0.3Dy0.7)1-xPrxFe1.55(0 ≤ x ≤ 0.4) particles with a size distribution of 10-300 νm embedded and aligned in a passive epoxy matrix using 0.5 volume fraction are fabricated. The quasistatic magnetomechanical properties of the composites are investigated and compared with their monolithic (Tb0.3Dy0.7)1-xPrxFe1.55alloys, as a function of the Pr content x. The composites show similar qualitative trends in properties with the alloys for all x. The (Tb0.3Dy0.7)0.75Pr0.25Fe1.55composite and alloy exhibit the smallest coercivity Hc, the largest magnetostriction λ and the highest piezomagnetic coefficient d33due to the successful compensation for magnetocrystalline anisotropy. The (Tb0.3Dy0.7)0.75Pr0.25Fe1.55composite demonstrates a large saturation magnetostriction λsof 793 ppm at 700 kA m-1and a high d33of 3.2 nm A-1at 140 kA m-1. These values approach 81% and 85% of its alloy values at the same field levels. The good properties make the (Tb0.3Dy0.7)0.75Pr0.25Fe1.55composite and alloy a promising magnetostrictive material system.
Original languageEnglish
Article number035002
JournalJournal of Physics D: Applied Physics
Volume42
Issue number3
DOIs
Publication statusPublished - 8 Apr 2009

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Acoustics and Ultrasonics
  • Surfaces, Coatings and Films

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