Figure 3
From: Preparation of epitaxial hexagonal YMnO3 thin films and observation of ferroelectric vortex domains
Piezoelectric force microscopy (PFM) image based on the in situ epitaxial YMO film in a 3.0×3.0 μm2 area. (a) Topography (b) amplitude contrast, (c) phase contrast and local switching spectroscopy for (d) PFM phase voltage hysteresis loop and (e) amplitude voltage butterfly loop.
