Abstract
A size effect of magnetic FeCo clusters in Na0.5Bi0.5TiO3/FeCo composites is presented, which is embodied by a strong size‐dependent magnetostrictive effect and magnetoelectric (ME) coupling effect. The size evolution of magnetic clusters induces the change of elastic energy in the magnetic phase, which is the key reason for the tunable magnetostrictive and mangetoelectric effects. An interface stress transferring mode is used to describe the coupling effect of the composites. This work explores a route to modulate ME materials by amorphous alloy clusters, which is of great significance to the development of magnetoelectronics.
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