Schematic structure (a) and hysteresis loop curve of ferroelectric (b). In (a), the green balls represent the A2+, blue balls are O2−, and the purple one is B4+; they are located at the vertex angle, centroid, and body center, respectively. In (b), the inserts are the corresponding location of B4+ in the lattice cell, with the bistability state obviously different from that of the dynamic random access memory which needs power to maintain its state.
Liu et al. Nanoscale Research Letters 2012 7:285 doi:10.1186/1556-276X-7-285