Fig. 17
a Topography (left sub-panel) and SthM (right sub-panel) images with 10 μm and b 8 μm scan sizes, revealing a crystalline line written into 200 nm GT and GST amorphous thin films by a focused laser beam. c The 2.5-μm images for GT and (d) GST taken from the spatial locations marked by the insets in a and b. Reprinted with permission from [112]