fig1
Figure 1. The stereographic projections of ferroelectric phases for (110)-oriented PTO thin films under anisotropic misfit strains at room temperature. (A-H) The stereographic projections of typical ferroelectric phases under different strain states. The schematic diagram in the center gives the ideal locations of different ferroelectric phases for (110)-oriented PTO films. The ranges of tetragonal-like, orthorhombic, and rhombohedral-like phases are marked by green, red, and orange solid circles. The magenta dashed circle indicates the position where the polarization vector deviates from the x3 axis by 45°, and the cyan dashed lines mark the four in-plane directions. The color reflects the intensity of the projection scatters.
