A review of magnetostrictive iron–gallium alloys

Abstract

A unique combination of low hysteresis, moderate magnetostriction at low magnetic fields, good tensile strength, machinability and recent progress in commercially viable methods of processing iron-gallium alloys make them well poised for actuator and sensing applications. This review starts with a brief historical note on the early developments of magnetostrictive materials and moves to the recent work on FeGa alloys and their useful properties. This is followed by sections addressing the challenges specific to the characterization and processing of FeGa alloys and the state of the art in modeling their actuation and sensing behavior.

Ultrafast changes of magnetic anisotropy driven by laser-generated coherent and noncoherent phonons in metallic films

“…We study a film of Galfenol, which is a novel ferromagnetic alloy of Iron and Gallium of high technological potential [20,21]. The combination of enhanced magnetostriction, high saturation magnetization of 1.8 T and low saturation field with technological accessibility makes Galfenol attractive for nanoscale magnetostrictive applications [21], e.g.…”

Phase diagrams of magnetic state transformations in multiferroic composites controlled by size, shape and interfacial coupling strain

“…Its outstanding mechanical and magnetic properties make it a promising candidate for different applications. 28 Here, we demonstrated that the stability of magnetic state of FeGa nanodots is not only a function of lateral dimensions, but also sensitive to interfacial coupling strain controlled by the magnitude and direction of the external electric field. Moreover, we systematically revealed how various transformation paths of magnetic states including those between states with different orders (i.e., one is polar and the other is vortex), and those between states with the same order (i.e., both are polar or both are vortex) can be electrically induced as schematically illustrated in Fig.…”

Improvement of Magnetostrictive Properties of Fe-15mol%Ga Alloy by Texture Formation during High Temperature Uniaxial Compression Deformation

“…1) Thus, the application of Fe-Ga alloys to actuator devices have actively investigated. In addition, the inverse effect of magnetostriction of Fe-Ga alloys has also attracted much attention for application to energy harvesting technology, which can generate electrical power from ambient vibration.…”