Research progress on the magnetoelectric coupling effect of core–shell structured composite multiferroic materials: review

Multiferroic composites with core–shell structured are materials that exhibit both ferromagnetic and ferroelectric properties, have gained great attentions due to its effectively enhanced interfacial contact and stress transfer. By selecting material types, tailoring the interconnection forms of the two phases, and employing microstructural tuning, further enhancement of magnetoelectric coupling (ME) effect can be achieved. Therefore, core–shell structured multiferroic composites hold significant application potential in non-volatile memory, sensors, and imaging diagnostics. This paper presents a review of the current state of research on multiferroic composites for nuclear shell structures based on the connection form of the material, focusing mainly on the 0–0, 0–3, 1–1, and 1–3 types of nuclear shell structures. Additionally, it analyzes the main influences of various factors (such as material types and compositions, dimensions, and morphologies) on ME effect under different connection forms. This provides a foundation for the subsequent regulation of the ME effect of core–shell structured multiferroic composites. Finally, the review summarizes the relevant applications of these materials in the fields of electronics and healthcare.