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Effect of interstitial additions on magnetostriction in Fe–Ga alloys
Ames Laboratory Conference Papers, Posters, and Presentations
  • Mianliang Huang, Iowa State University
  • Thomas A. Lograsso, Iowa State University
  • A. E. Clark, Clark Associates
  • J. B. Restorff, United States Navy
  • M. Wun-Fogle, United States Navy
Document Type
Conference Proceeding
52nd Annual Conference on Magnetism and Magnetic Materials
Publication Date
(27.950575, -82.45717760000002)

The additions of trace amounts of small interstitial atoms (carbon, boron, and nitrogen) to Fe–Ga (Galfenol) alloys have a small but beneficial effect on the magnetostriction of Fe–Ga alloys especially at high Ga compositions. The saturated magnetostrictions [(3/2)λ100’s] of both slow cooled and quenched single crystal Fe–Ga–C alloys with Ga contents >18 at. % are about 10%–30% higher than those of the comparable binary Fe–Ga alloys. For boron and nitrogen additions, the magnetostrictions of slow cooled alloys with Ga content >18 at. % were approximately 20% higher than those of the binary Fe–Ga alloys. We assume that these small atoms enter interstitially into the octahedral site as in pure α-Fe and inhibit chemical ordering, resulting in increased λ100. Thermal analysis of the Fe–Ga binary alloys and Fe–Ga–C ternary alloys indicates that the addition of C into the Fe–Ga system decreases the formation kinetics of D03 and extends the disordered region beyond the maximum for slow cooled binary samples.


Copyright 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

The following article appeared in Journal of Applied Physics 103 (2008): 07B314 and may be found at

Copyright Owner
American Institute of Physics
Citation Information
Mianliang Huang, Thomas A. Lograsso, A. E. Clark, J. B. Restorff, et al.. "Effect of interstitial additions on magnetostriction in Fe–Ga alloys" Tampa, FL(2008)
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