Figure 4
From: Electrical and mechanical switching of ferroelectric polarization in the 70 nm BiFeO3 film
The mechanical switching of ferroelectric polarization.
The OP and IP phase images of the 6 V polarized area observed by a PFM tip with (a,b) 0o and (c,d) 90o rotations and the images of the same area after it was polarized by a mechanical force of (e–h) 875 nN, (i–l) 1050 nN, (m–p) 1330 nN, where the inset is the surface morphology, the five independent regions are marked with G,H,I,J and K and the percent is the ratio of area with downward polarization.
