To find a new promising multiferroics among complex metal oxides in which ferroelectricity and ferromagnetism coexist around the room temperature, one needs to know the most important requirements for new materials which can offer a large and robust magnetization and polarization. This chapter presents analysis of experimental data which allow one to draw a conclusion about important “chemical composition-atomic (magnetic)/real structure-properties-preparation conditions” relationships for oxide multiferroics. Based on the experimental and theoretical facts known today several essential guidelines for realization of a possibility of simultaneous ordering of electric dipoles and magnetic moments near a room temperature in these multiferroics are considered. To design and prepare a room-temperature multiferroic is a very difficult task and, in a first approximation, equivalent to the challenge of finding a needle in a haystack. Nevertheless, the importance of this chapter is in that it indicates which “haystack” to select for a productive search.
Ivanov, S. (2012). Multiferroic complex metal oxides: Main features of preparation, structure, and properties. Science and Technology of Atomic, Molecular, Condensed Matter and Biological Systems, 2(1), 163–238. https://doi.org/10.1016/B978-0-44-453681-5.00007-8