Fig. 3

Complex patterns from superposition of simple individual fields. The structures shown were prepared by overlapping a, Two hexagonal arrays of circular dots at angles 5°, 10°, 15°, and 20°. b Two arrays of squares at angles 15°, 30° and 45°. c A circular structure formed between two arrays of concentric circles. The green miniatures are moiré patterns which are similar—but not identical—to the magnetic structures we observe. In the experimental images in a, note that some of the features are much smaller/thinner than the original dots. All scale bars = 500 μm