Magnetostriction in <0kl>-oriented composites with CoMnSi microspheres

CoMnSi exhibits weak mechanical performance and a low magnetostriction in polycrystals, which limits its potential magnetostrictive properties. Herein, we reported that a large reversible magnetostriction up to 1500 ppm in an oriented CoMnSi microspheres/epoxy resin composite. Textured CoMnSi microspheres (50–70 μm) were prepared in our designed nonwetting annealing method by dispersing the crushed particles into solid dispersions and melting them into spheres in a nonwetting environment. Facilitated by the spherical morphology, the <0kl> -oriented CoMnSi microspheres/epoxy resin composites with high volume fraction were produced in a 5 kOe uniform magnetic field. The uniform orientation and the high volume fraction of CoMnSi microspheres contribute to the large magnetostriction of CoMnSi composite. This work may provide a promising universal preparation method for spherical particles of intermetallic compounds and path a novel approach to optimizing property for magnetic material composites.