Forced volume magnetostriction in composite Gd 5Si 2Ge 2

Nersesse Nersessian, Siu Wing Or, Gregory P. Carman, S. McCall, Wonyoung Choe, Harry B. Radousky, Vitalij K. Pecharsky, Alexandra O. Pecharsky

Research output: Journal article publicationConference articleAcademic researchpeer-review

Abstract

A -1200 ppm forced volume magnetostriction has been obtained in a [0-3], resin-bonded, Gd5Si2Ge5participate composite. The strain is a result of a magnetically induced phase transformation from a high volume (high temperature, low magnetic field) monoclinic phase to a low volume (low temperature, high magnetic field) orthorhombic phase. The particles used in the composite were ball-milled from a bulk sample and sieved to obtain a size distribution of ≤600 μm. Bulk Gd5Si2Ge2was manufactured via arc melting and subsequently annealed at 1300°C for 1 hour to produce a homogenous, polycrystalline sample. The transformation temperatures of the bulk sample, as measured using a Differential Scanning Calorimeter (DSC), were Ms= -9.3°C, Mf= -14.6°C, As= -4.4°C, and Af= -1.2°C. The composite and the bulk samples were magnetically characterized using a SQUID magnetometer, and found to undergo a paramagnetic to ferromagnetic transition during the phase transformation, consistent with published results. The bulk sample was also found to possess a maximum linear magnetostriction of-2500 ppm.
Original languageEnglish
Pages (from-to)64-71
Number of pages8
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5387
DOIs
Publication statusPublished - 26 Oct 2004
Externally publishedYes
EventSmart Structures and Materials 2004 - Active Materials: Behaviour and Mechanics - San Diego, CA, United States
Duration: 15 Mar 200418 Mar 2004

Keywords

  • [0-3] composites
  • Gd Si Ge 5 2 2
  • Phase transformation
  • Volume magnetostriction

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics

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