Fig. 5: Ferroelectricity of S-F.
From: Organic radical ferroelectric crystals with martensitic phase transition
a The J–V (dotted) and P–V (solid) curves of S-F showing a typical ferroelectric hysteresis loop. Vertical PFM phase (b) and amplitude (c) images of S-F overlaid on the 3D topographic image. d–f The electrical switching of the ferroelectric domain at LTP by applying ±150 V voltage on the white dots for 20 s: (d) pristine, (e) after applying a positive bias voltage, and (f) after applying a negative bias voltage. The regions of domain wall movement are marked with white dashed circles. g–i The electrical switching of the ferroelectric domain at HTP by applying ±120 V voltage in the white boxes: (g) pristine, (h) after applying a positive bias voltage, and (i) after applying a negative bias voltage.
