714625.fig.005a
(a)
714625.fig.005b
(b)
Figure 5: Temperature dependence of specific heat of BaTiO3 epitaxial thin films on SrTiO3 substrate; (a) 2000 Å thick and (b) 60 Å thick. The arrows show the direction of heating and cooling. The sharp anomalous specific heat in the single crystal changes to diffuse one in thin films [21].