Hexagonal Manganites—(RMnO3): Class (I) Multiferroics with Strong Coupling of Magnetism and Ferroelectricity
Figure 17
Isothermal field scans of the dielectric constant at different temperatures. Different curves are vertically offset for better clarity. Phase boundaries to and the -peak at are marked by dashed lines. (a) to (c) show curves between 9 K and 2 K up to 40 kOe. (d) shows the emergence of the LT2 phase. (e) displays the valley-like anomaly of in the LT1 phase and the merging and phase boundaries. (f) highlights the upper field boundary of the LT2 phase in data extending to 130 kOe.
