Skip to the content

Magnetomechanical performance of directionally solidified Fe-Ga alloys

Zhao, X, Mellors, NJ and Lord, DG 2007, 'Magnetomechanical performance of directionally solidified Fe-Ga alloys' , Journal of Applied Physics, 101 (9) , 09C513.

[img] PDF (Publisher version)
Download (114kB)

Abstract

Iron-gallium alloys can produce magnetostrictions of ~400 ppm and might serve as mechanically robust actuator/sensing materials. However, for polycrystalline Fe-Ga alloys, the magnetostrictive performance decreases with the increasing deviations from the ideal <100> texture. In this paper, three directionally solidified Fe-Ga alloys with gallium contents of 17, 18.4, and 19.5 at. % were characterized at ambient temperature. These specimens exhibit high d33 and magnetic permeability when subjected to applied magnetic fields, indicating their suitability for light weight actuator applications but not for high force applications due to their low saturation magnetostriction and hence low blocking force. All the alloys produce significant changes in magnetization, around 0.7Ms-0.8Ms when subjected to cyclic compressive stresses of 51 MPa, making them promising candidate materials for sensing and energy harvesting applications. However, eddy current effects may easily become a problem when such materials are subjected to a high frequency vibration or magnetic field due to their intrinsic high magnetic permeability.

Item Type: Article
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Journal or Publication Title: Journal of Applied Physics
Publisher: American Institute of Physics
Refereed: Yes
ISSN: 00218979
Related URLs:
Depositing User: H Kenna
Date Deposited: 07 Sep 2007 14:51
Last Modified: 20 Aug 2013 15:47
URI: http://usir.eprints.org/id/eprint/412

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)

Downloads

Downloads per month over past year