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Magnetic field dependence of galfenol elastic properties
Ames Laboratory Conference Papers, Posters, and Presentations
  • G. Petculescu, University of Mississippi
  • K. B. Hathaway, United States Navy
  • Thomas A. Lograsso, Iowa State University
  • M. Wun-Fogle, United States Navy
  • A. E. Clark, Clark Associates
Document Type
Conference Proceeding
49th Annual Conference on Magnetism and Magnetic Materials
Publication Date
(30.3321838, -81.65565099999998)
Elastic shear moduli measurements on Fe100−xGax (x = 12–33) single crystals (via resonant ultrasound spectroscopy) with and without a magnetic field and within 4–300 K are reported. The pronounced softening of the tetragonal shear modulus c′ is concluded to be, based on magnetoelastic coupling, the cause of the second peak in the tetragonal magnetostriction constant λ100 near x = 28. Exceedingly high ΔE effects ( ∼ 25%), combined with the extreme softness in c′ (c′<10 GPa), suggest structural changes take place, yet, gradual in nature, as the moduli show a smooth dependence on Ga concentration, temperature, and magnetic field. Shear anisotropy (c44/c′) as high as 14.7 was observed for Fe71.2Ga28.8.

Copyright 2005 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.

This article appeared in Journal of Applied Physics 97 (2005): 10M315 and may be found at

Copyright Owner
American Institute of Physics
Citation Information
G. Petculescu, K. B. Hathaway, Thomas A. Lograsso, M. Wun-Fogle, et al.. "Magnetic field dependence of galfenol elastic properties" Jacksonville, FL(2005)
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