Magnetic domains in magnetostrictive Fe–Ga alloys

Date
2008-11-03
Authors
Xing, Qingfeng
Lograsso, Thomas
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Ames Laboratory
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Abstract

Lorentz microscopy was applied to the observation of magnetic domains in iron-gallium (Fe–Ga) alloys. Results did not show any link between the magnetic domains and the magnetostriction enhancement by Ga addition, but did reveal that the drastic decrease in magnetostriction for Fe–31.2 at. % Ga was due to the presence of large scale precipitates. Magnetic domain features did not change in the alloys of A2, D03, A2+D03,A2+B2+D03, and A2+fine scale precipitates. Large scale precipitates within the slow-cooled Fe–31.2 at. % Ga affected both the distribution and wall motion of magnetic domains.

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The following article appeared in Applied Physics Letters 92 (2008): 182501 and may be found at http://dx.doi.org/10.1063/1.3013575.

Keywords
alloying additions, gallium alloys, iron alloys, magnetic domain walls, magnetostriction, precipitation
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