Abstract
A -1300ppm strain has been obtained in a [0-3], resin binder, Gd5Si2Ge2participate composite. The strain is a result of a temperature 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 were sieved to obtain a size distribution of ≤ 600μm. Bulk Gd5Si2Ge2was manufactured via arc melting and subsequently annealed at 1300°C for 1 hour to produce a textured, 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 bulk sample was 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 - 8000ppm volume magnetostriction, agreeing well with measured unit cell parameters of the different phases.
| Original language | English |
|---|---|
| Pages (from-to) | 25-30 |
| Number of pages | 6 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 5053 |
| DOIs | |
| Publication status | Published - 27 Nov 2003 |
| Externally published | Yes |
| Event | PROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Smart Structures and Materials 2003 Active Materials: Behavior and Mechanics - San Diego, CA, United States Duration: 3 Mar 2003 → 6 Mar 2003 |
Keywords
- [0-3] Composites
- Gd Si Ge 5 2 2
- Phase transformationy
- Volume Magnetostriction
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Condensed Matter Physics