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Magnetostriction of ternary Fe–Ga–X alloys (X=Ni,Mo,Sn,Al)
Journal of Applied Physics
  • J. B. Restorff, United States Navy
  • M. Wun-Fogle, United States Navy
  • A. E. Clark, Clark Associates
  • Thomas A. Lograsso, Iowa State University
  • A. R. Ross, Iowa State University
  • Deborah L. Schlagel, Iowa State University
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Investigations were made into the effect of small additions of Ni, Mo, Sn, as well as larger additions of Al on the magnetostriction of single crystal Fe100−xGax alloys (x≅13). The Fe–Ga and Fe–Al systems are seemingly unique among the Fe-based alloys in having very large magnetostrictions in spite of Ga and Al being nonmagnetic. In this paper, we show how additions of Ni, Mo, Sn, and Al affect λ100 and λ111 of the binary Fe–Ga alloys. We substituted small amounts of Ni into a binary Fe–Ga alloy in an attempt to reduce the magnitude of the negative λ111, as Ni does in Fe, in order to improve the magnetostriction of polycrystals. The measured λ111’s were reduced to a very small value, ∼3 ppm, butλ100 fell dramatically to +67 ppm for Fe86Ga11Ni3. Mo was substituted for Ga to determine the effect of a partially filled 4d shell on the magnetostriction. Here ∣λ111∣ is affected the most, increasing to a value greater than all known α-Fe-based alloys (λ111=−22 ppm for Fe85Ga10.2Mo4.8). We find that the addition of Sn, with its very large atomic radius, makes only small changes in both λ100 and λ111. For Fe86.1Ga12.4Sn1.5 at room temperature, λ100=+161 ppm and for Fe86.7Ga12.0Sn1.3, λ111=−15 ppm. The decrease ofλ100 in Fe87(GayAl1−y)13 was approximately linear, going from 67 ppm at y=0 to 154 ppm at y=1.

The following article appeared n Journal of Applied Physics 91 (2002): 8225 and may be found at

Copyright 2002 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.
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American Institute of Physics
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J. B. Restorff, M. Wun-Fogle, A. E. Clark, Thomas A. Lograsso, et al.. "Magnetostriction of ternary Fe–Ga–X alloys (X=Ni,Mo,Sn,Al)" Journal of Applied Physics Vol. 91 Iss. 10 (2002) p. 8225 - 8227
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