Nguyen VD, Torres WS, Laczkowski P, Marty A, Jamet M, Beigné C, Notin L, Vila L, Attané JP. Elementary depinning processes of magnetic domain walls under fields and currents.
Sci Rep 2014;
4:6509. [PMID:
25270773 PMCID:
PMC4180821 DOI:
10.1038/srep06509]
[Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 07/24/2014] [Indexed: 11/09/2022] Open
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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