Role of nanoscale precipitates on the enhanced magnetostriction of heat-treated galfenol (Fe1-xGax) alloys.

نویسندگان

  • H Cao
  • P M Gehring
  • C P Devreugd
  • J A Rodriguez-Rivera
  • J Li
  • D Viehland
چکیده

We report neutron diffuse scattering measurements on highly magnetostrictive Fe1-xGax alloys (0.14<x<0.20) with different thermal treatments. This diffuse scattering scales with magnetostriction and exhibits asymmetric peaks at the (100) and (300) reciprocal lattice positions that are consistent with the coexistence of short-range ordered, coherent nanometer-scale precipitates embedded in a long-range ordered, body-centered cubic matrix. A large peak splitting is observed at (300) for x=0.19, which indicates that the nanoprecipitates are not cubic and have a large elastic strain. This implies a structural origin for the enhanced magnetostriction.

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عنوان ژورنال:
  • Physical review letters

دوره 102 12  شماره 

صفحات  -

تاریخ انتشار 2009