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Experimental Actuation and Sensing Behavior of Single-crystal Iron-Gallium Alloys

Department of Aerospace Engineering, University of Maryland College Park, MD 20740, USA

^* To whom correspondence should be addressed.

	Abstract

The effect of Ga content on the actuation behavior, i.e., (magnetostriction)–H and B–H curves, of single-crystal iron-gallium (FeGa) is studied by characterizing 19, 24.7, and 29 at.% Ga 100 oriented slow cooled samples. The strikingly different behavior exhibited by these samples is discussed and explained in this study. In an attempt to understand the effect of crystallographic direction on the magnetomechanical behavior, the actuation and sensing, i.e., (total strain)– and B– characterization of both a 100 oriented 19 at.% Ga sample and 110 oriented 18 at.% Ga is performed, and is presented and analyzed. Furthermore, a testing paradigm that has been developed to characterize the sensing behavior independent of the magnetic interaction between the magnetostrictive sample and the magnetic bias circuit is discussed.

Key Words: magnetostrictive, single-crystal varied Ga content, actuator, sensor, Iron-Gallium.

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