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Title: Stability of a pinned magnetic domain wall as a function of its internal configuration

It is shown that there are many stable configurations for a domain wall pinned by a notch along a magnetic stripe. The stability of several of these configurations is investigated numerically as a function of the thickness of the magnetic film. The depinning mechanism depends on the structure of the domain wall and on the thickness of the magnetic film. In the case of a spin-valve structure, it appears that the stray fields emerging from the hard layer at the notch location influence the stability of the micromagnetic configuration. Different depinning mechanisms are thus observed for the same film thickness depending on the magnetization orientation of the propagating domain. This conclusion qualitatively explains experimental magnetoresistance measurements.
Authors:
; ; ; ;  [1] ;  [2]
  1. Institut Jean Lamour, Université de Lorraine, CNRS, BP 70239, F-54506 Vandoeuvre lès Nancy (France)
  2. HGST San Jose Research Center, 3403 Yerba Buena Rd, San Jose, California 95135 (United States)
Publication Date:
OSTI Identifier:
22412824
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 2; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DOMAIN STRUCTURE; FILMS; LAYERS; MAGNETIC FLUX; MAGNETISM; MAGNETIZATION; MAGNETORESISTANCE; ORIENTATION; SPIN; STABILITY; THICKNESS; VALVES