Giant and reversible magnetostriction in 〈100〉-oriented CoMnSi microspheres/epoxy resin composite

Magnetostrictive properties of CoMnSi are generally confined by their intrinsic brittleness and difficulty in growing into anisotropic bulk materials. In this study, we present a new type of 〈100〉-oriented CoMnSi microspheres/epoxy resin composite that exhibits a giant and reversible magnetostriction of 6700 ppm. 〈100〉-textured CoMnSi microspheres were synthesized through the non-wettability between CoMnSi liquid and solid dispersions. The microspheres/epoxy composites with a uniform 〈100〉 orientation were produced by applying a simulating rotating magnetic field. The improved magnetostriction in the composite was associated with microspheres' texture as well as their orientation. This work may shed light on the synthesis of textured metal spheres and the development of magnetic composite materials.