Full text loading...
(Color online) (a) Cartoon of sample with c-axis orientation and angle definition. Cantilever orientation is always horizontal. (b) and (c) PFM images of HoMnO3 (110) surface at smallest and largest angles (color scales: 2.5 pm/V and 5 pm/V, respectively). The dashed circle shows the same area in each image. (d) Spatially averaged line profile from the solid box in (b) used for measuring domain contrast. (e) Domain (filled circles) and domain wall (filled squares) PFM contrast versus angle with fitted curves. The vertical offset of the cosine fit is shown by the horizontal line.
(Color online) (a) Buckled cantilever with beginning (1) and ending (5) laser positions shown. (b) and (c) PFM images taken with the laser on either side of the buckled cantilever’s hump (color scales: both 8.5 pm/V). (d) and (e) Domain (filled circles) and domain wall (filled squares) PFM contrast versus laser position for cantilever parallel and perpendicular to c-axis.
(Color online) (a) and (b) Out-of-plane response of domain walls with head-to-head and tail-to-tail in-plane displacements due to shear piezoelectric response. Side-to-side in-plane displacements (not shown) do not create out-of-plane surface displacement. (c) PFM image (color scale: 2 pm/V) with the c-axis (long arrow) and an example wall normal (short arrow) shown. (d) Angular dependence (angle measured between c-axis and wall normal) of domain wall PFM signal with a cosine fit function.
Article metrics loading...