Hexagonal Manganites—(RMnO₃): Class (I) Multiferroics with Strong Coupling of Magnetism and Ferroelectricity

Figure 29

(a) Thermal expansion of the 𝑎- and 𝑐-axes of YMnO₃. (b) Thermal expansivities of 𝑎 and 𝑐 showing a 𝜆-shaped anomaly at 𝑇_𝑁.

(a)

(b)