Figure 4: Bright field TEM images of magnetic islands milled out of a thin film using raster style scanning (pattern was defined by a bitmap image of the design) ((a) and (b)), and their corresponding phase shift image (c) reconstructed by using transport-of-intensity technique shows the islands supporting magnetic vortex states. The dark and bright spots at the center of the islands relate to clockwise/counterclockwise rotation of magnetization. From Ch. Phatak, Argonne National Laboratory, Materials Science Division, presented at the 54th EIPBN conference, 2010.