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Plots of log(tDMFVMMs/f) versus the final migration distance across the breadth of the DMF channel for the two assumed magnetic fields: decreasing gradient in B (Micro DMF I, red curve) and approximately constant gradient in B (Micro DMF II, blue curve). Initial position x0 of 0.05 mm assumed in each case and the horizontal axis corresponds to the breadth of the DMF channel.
