J. Sampaio, L. O'Brien, D. Petit, D. E. Read, E. R. Lewis, H. T. Zeng, L. Thevenard, S. Cardoso, R. P. Cowburn
The magnetostatic interaction between magnetic domain walls (DWs) in adjacent nanotracks has been shown to produce strong inter-DW coupling and mutual pinning. In this paper, we have used electrical measurements of adjacent spin-valve nanotracks to follow the positions of interacting DWs. We show that the magnetostatic interaction between DWs causes not only mutual pinning, as observed till now, but that a travelling DW can also induce the depinning of DWs in near-by tracks. These effects may have great implications for some proposed high density magnetic devices (e.g. racetrack memory, DW logic circuits, or DW-based MRAM).
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http://arxiv.org/abs/1303.4422
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