Model for magnetostrictive performance in soft/hard coupled bilayers

A model is set up to investigate the magnetostrictive performance and spin response in soft/hard magnetostrictive coupled bilayers. Direct coupling between soft ferromagnet and hard TbFe₂ at the interface is assumed. The magnetostriction results from the rotation of ferromagnetic vector and TbFe₂ vectors from the easy axis driven by applied magnetic field. Dependence of magnetostriction on TbFe₂ layer thickness and interfacial exchange interaction is studied. The simulated results reveal the compromise between interfacial exchange interaction and anisotropy of TbFe₂ hard layer. - Highlights: • A model for magnetostrictive performance in soft/hard coupled bilayers. • Simulated magnetostriction loop and corresponding spin response. • Competition and compromise between interfacial interaction and TbFe₂ anisotropy. • Dependence of saturated magnetostriction on different parameters