ABSTRACT
Among the type-I multiferroics, the most important group belongs to the transition metal pervoskite oxide family. ey possess intriguing properties and strong coupling of order parameters, serving as unique platforms for
Contents 2.1 Multiferroics with a Double-Perovskite Structure .................................. 36 2.2 Lone-Pair Electron Multiferroic Systems .................................................. 38
2.2.1 Lone-Pair Electron Multiferroic Systems: BiFeO3 ...................... 38 2.2.1.1 Domain Engineering in BiFeO3 in Films ................ 41 2.2.1.2 Properties of Domain Walls in BiFeO3 ........................ 43
2.2.2 Lone-Pair Electron Multiferroic Systems: BiMnO3 .................... 47 2.2.3 Solid Solution Lone-Pair Systems ................................................. 49 2.2.4 Other Single-Phase Lone-Pair Multiferroic Systems ................. 53
2.3 Other Single-Phase Multiferroic Systems: Geometric Ferroelectricity .....54 2.4 Conclusions and Outlook ............................................................................ 57 References ................................................................................................................. 57
fundamental study and oering tantalizing opportunities for practical applications. In this chapter, we will review the current status of research that has been done on this group of multiferroics.
