Compositional Dependence of Ferroelectric Properties for (Y,Yb)MnO₃ Thin Films Prepared by Chemical Solution Deposition

Abstract

The (Y,Yb)MnO₃ thin films were prepared using alkoxy-derived precursor solutions. The hexagonal phase crystallized in Ar atmosphere and the films had high crystallinity and high degrees of c-axis orientation. The substitution of Y by Yb in YMnO₃ lowered the crystallization temperature. The Y_0.5Yb_0.5MnO₃ and YbMnO₃ films crystallized at 700°C had c-axis orientation and showed the saturated P-E hysteresis loop. The remanent polarization and coercive field were 1.7 μC/cm² and 100 kV/cm for Y_0.5Yb_0.5MnO₃ film, and 2.1 μC/cm² and 100 kV/cm for YbMnO₃ film, respectively. The Y_0.5Yb_0.5MnO₃ film crystallized at 700°C showed good fatigue property.

Keywords:

• (Y,Yb)MnO₃ thin film
• chemical solution deposition
• ferroelectric property
• orientation
• microstructure