Dielectric, magnetic and magnetoelectric properties of multiferroic BiFe_(0.5)Cr_(0.5)O_(3)-NiFe_(2)O_(4) composites

摘要

Multiferroic composites of NiFe_(2)O_(4) (NFO) and BiFe_(0.5)Cr_(0.5)O_(3) (BFCO) are synthesized and their dielectric, magnetic, and magnetoelectric (ME) properties are measured at room temperature. NFO-BFCO forms a two-phase composite. The composite has a larger magnetization and dielectric constant than those of both parent compounds, due to the effects of interfacial strain on BFCO. Furthermore, the ME response in NFO-BFCO is about one time larger than that of BFCO, revealing the success of magnetic control of the dielectric response via the mechanical coupling, which can be exploited in the future applications of multiferroic composites.