Cluster‐Size‐Dependent Linear Magnetoelectric Coupling Effect in Na_0.5Bi_0.5TiO₃/FeCo Composites

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.

Tuning Exchange Coupling in a New Family of Nanocrystal-Based Granular Multiferroics Using an Applied Electric Field

“…In contrast, at 65 K, the maximum value is only a little over 1 × 10 −5 1/(V/cm). While this value is ∼20× lower than that of a typical strain-coupled multiferroic, 42 it is still significant, and there is much space for future optimization of GMFs of this type. More details can be found in the Supporting Information, including full plots of the field-dependent ME coefficient in Figure S2.…”

Light-Controlled Magnetoelastic Effects in Ni/BaTiO3 Heterostructures

“…Multiferroic materials are of appealing scientific and technological interest owing to their magnetoelastic and magnetoelectric properties, originating from intertwined ferromagnetic and ferroelectric order parameters. , However, the room temperature (RT) device application of single phase multiferroics is hampered by the strength of magnetoelectric strength as well as by the complex relation between electric and magnetic polarization. − An artificial multiferroic (AM) provides an alternate strategy to engineer functional devices via introducing an indirect coupling between two materials such as a ferroelectric and a ferromagnetic. This indirect coupling between the two ferroic materials occurs extrinsically by strain or charge carrier or spin exchange and can be achieved in the form of composites, , laminates, , or nanostructures, , which combined together show multiferroicity. From the application point of view, in the thin film-based AM, each layer of ferroelectric–ferromagnetic heterostructure allows a separate promising tuning of the relevant physical properties, such as structural, electrical, or magnetic properties, manifesting the potentiality of these novel devices.…”