Hexagonal Manganites—(RMnO3): Class (I) Multiferroics with Strong Coupling of Magnetism and Ferroelectricity
Figure 3
Triangular sublattices of Mn ions of hexagonal RMnO3, viewed along the -axis. The two subsequent Mn layers in the unit cell are distinguished by blue and red color. The magnetic unit cell is shown (origin at X) and the black arrows indicate the Mn spin order in the (a) model and (b) model. The angle determines different magnetic symmetries, as discussed in the text.
