Multiferroicity in Aurivillius Based Bi4Ti3O12 Ceramics: An Overview, Future Prospective and Comparison with Ferrites

The growing modern society demands more new generation devices to fulfil their requirements. This has forced the scientific community to develop multifunctional smart devices. Aurivillius based Bi4Ti3O12 ceramics are one of the leading families of oxide materials, which attract immense attention due to their electrical, ferroelectric, optical, and dielectric properties. These materials have gained special attention due to their numerous device applications such as magnetic recording, sensors, read head technology, spintronic devices, switching devices, data storage devices and multiple state memory devices etc. Multiferroic are the materials in which two or more than two ferroic orders exist simultaneously. This chapter focuses on the possibility of existence of multiferroic behaviour in Aurivillius based compounds specially Bi4Ti3O12. Firstly, we have discussed the basics of multiferroics and their types and the magnetoelectric effect. The effect of different dopants in originating the multiferroism in Bi4Ti3O12 have been reviewed and discuss in detail. At the end comparison of multiferroic and ferrite materials and their future perspective have been discussed.