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Published on: November 7, 2017
Elementary depinning processes of magnetic domain walls under fields and currents
V D Nguyen1, W Savero Torres2, P Laczkowski2
11] INAC/CEA Grenoble and Université Joseph Fourier, 38054, Grenoble, France [2] Institut Néel and Université Joseph Fourier, 38042 Grenoble, France.
Abstract:
The probability laws associated to domain wall depinning under fields and currents have been studied in NiFe and FePt nanowires. Three basic domain wall depinning processes, associated to different potential landscapes, are found to appear identically in those systems with very different anisotropies. We show that these processes constitute the building blocks of any complex depinning mechanism. A Markovian analysis is proposed, that provides a unified picture of the depinning mechanism and an insight into the pinning potential landscape.
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