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. 2016 Mar 4;7:10854. doi: 10.1038/ncomms10854

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(a) Applied current density pulse pattern and (b) resulting anomalous Hall resistance R_AHE. Switching is observed for one current polarity in either state, without any applied magnetic field. Differential Kerr microscopy images of the microwire after switching to (c) the low R_AHE state and (d) the high R_AHE state confirming the magnetization reversal. Scale bars, 2.5 μm (the top left corners).