Oxide superlattices for multiferroics: opportunities, issues, and challenges

Abstract

Multiferroics form a rare class of materials, which simultaneously display various extraordinary properties that are usually absent in the classical case. Consequently, they are potential candidates for various novel devices which are unachievable by the conventional materials utilized for device applications. In this letter, we detail the alternative methodology to design an artificial multiferroic by the superlattice approach, which will circumvent the looming problem of their rarity. Details of the way of selecting the various superlattice components, controlling their properties, the role of interfaces, and the methodology of inducing the coupling between distinct orders are presented. Furthermore, we also discuss the various limitations, issues, and challenges in designing such heterostructures.

Acknowledgements

This work has been carried out in the framework of the European Network of Excellence “Functionalized Advanced Materials Engineering of Hybrids and Ceramics” FAME (FP6-500159-1), and the Specific Targeted Research European Project “Manipulating the Coupling in Multiferroic Films (MaCoMuFi)” No. NMP3-CT-2006-033221 supported by the European community and Centre National de la Recherche Scientifique (CNRS), France. Partial support from the Agence National de la Recherche Scientifique (NT05-1-45177, NT05-3-41793) is also gratefully acknowledged.