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Title: Néel walls between tailored parallel-stripe domains in IrMn/CoFe exchange bias layers

Tailored parallel-stripe magnetic domains with antiparallel magnetizations in adjacent domains along the long stripe axis have been fabricated in an IrMn/CoFe Exchange Bias thin film system by 10 keV He{sup +}-ion bombardment induced magnetic patterning. Domain walls between these domains are of Néel type and asymmetric as they separate domains of different anisotropies. X-ray magnetic circular dichroism asymmetry images were obtained by x-ray photoelectron emission microscopy at the Co/Fe L{sub 3} edges at the synchrotron radiation source BESSY II. They revealed Néel-wall tail widths of 1 μm in agreement with the results of a model that was modified in order to describe such walls. Similarly obtained domain core widths show a discrepancy to values estimated from the model, but could be explained by experimental broadening. The rotation senses in adjacent walls were determined, yielding unwinding domain walls with non-interacting walls in this layer system.
Authors:
; ;  [1] ;  [2] ;  [3] ; ;  [2]
  1. Institute of Physics and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), University of Kassel, Heinrich-Plett-Str. 40, 34132 Kassel (Germany)
  2. Peter Gruenberg Institute and JARA-FIT, FZ Juelich, D-52425 Juelich (Germany)
  3. (Germany)
Publication Date:
OSTI Identifier:
22399334
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 12; 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; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ANISOTROPY; COBALT; DOMAIN STRUCTURE; EMISSION SPECTROSCOPY; HELIUM IONS; INTERMETALLIC COMPOUNDS; ION BEAMS; ION IMPLANTATION; IRIDIUM; IRON; KEV RANGE; LAYERS; MAGNETIC CIRCULAR DICHROISM; MAGNETIZATION; MANGANESE; NEEL TEMPERATURE; THIN FILMS; X RADIATION; X-RAY PHOTOELECTRON SPECTROSCOPY