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Hysteresis in Coupled Arrays of Bistable Microwrinkles

Using designed nanopatterns, we fabricate pairs of quasi-one-dimensional arrays of self-organized microwrinkles with bistable orientation states to investigate the effect of the interaction between arrays on the hysteresis of the microwrinkle orientations subjected to a rotating uniaxial compressive strain field. The distorted hysteresis loops for the short separation between arrays indicate that the non-parallel configurations of microwrinkle orientations between arrays observed during the transitions are stabilized. Simulations using the corresponding Ising model suggest that the microwrinkle orientations between arrays are coupled via anti-ferromagnetic-like interactions.