Spin-wave dispersion in magnetostrictive Fe-Ga alloys: Inelastic neutron scattering measurements

Date
2007-02-12
Authors
Lograsso, Thomas
Zarestky, Jerel
Moze, O.
Schlagel, Deborah
Lynn, J.
Chen, Y.
Lograsso, Thomas
Schlagel, Deborah
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Altmetrics
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Ames Laboratory
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Abstract

Fe-Ga alloys of appropriate Ga concentration and heat treatment show a very large enhancement in the tetragonal magnetostriction over that of pure α-Fe [λ100(Fe-Ga)∼15λ100(Fe)]. In order to gain further understanding of the extraordinary magnetoelastic characteristics of this system, the spin dynamics of two of these alloys, Fe1−xGax (x=0.160 and 0.225), were studied using inelastic neutron scattering techniques. The correlation of the spin-wave dispersion curve with the lattice constant and atomic radii of solute is examined for this and other Fe alloys.

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<p>This article is from <em>Physical Review B</em> 75 (2007): 052406, doi:<a href="http://dx.doi.org/10.1103/PhysRevB.75.052406" target="_blank">10.1103/PhysRevB.75.052406</a>.</p>
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