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

Abstract

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

Citation Formats

Ueltzhöffer, Timo, E-mail: timo.ueltzhoeffer@physik.uni-kassel.de, Schmidt, Christoph, Ehresmann, Arno, Krug, Ingo, Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Nickel, Florian, and Gottlob, Daniel. Néel walls between tailored parallel-stripe domains in IrMn/CoFe exchange bias layers. United States: N. p., 2015. Web. doi:10.1063/1.4916093.
Ueltzhöffer, Timo, E-mail: timo.ueltzhoeffer@physik.uni-kassel.de, Schmidt, Christoph, Ehresmann, Arno, Krug, Ingo, Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Nickel, Florian, & Gottlob, Daniel. Néel walls between tailored parallel-stripe domains in IrMn/CoFe exchange bias layers. United States. doi:10.1063/1.4916093.
Ueltzhöffer, Timo, E-mail: timo.ueltzhoeffer@physik.uni-kassel.de, Schmidt, Christoph, Ehresmann, Arno, Krug, Ingo, Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin, Nickel, Florian, and Gottlob, Daniel. Sat . "Néel walls between tailored parallel-stripe domains in IrMn/CoFe exchange bias layers". United States. doi:10.1063/1.4916093.
@article{osti_22399334,
title = {Néel walls between tailored parallel-stripe domains in IrMn/CoFe exchange bias layers},
author = {Ueltzhöffer, Timo, E-mail: timo.ueltzhoeffer@physik.uni-kassel.de and Schmidt, Christoph and Ehresmann, Arno and Krug, Ingo and Institut für Optik und Atomare Physik, Technische Universität Berlin, Berlin and Nickel, Florian and Gottlob, Daniel},
abstractNote = {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.},
doi = {10.1063/1.4916093},
journal = {Journal of Applied Physics},
number = 12,
volume = 117,
place = {United States},
year = {Sat Mar 28 00:00:00 EDT 2015},
month = {Sat Mar 28 00:00:00 EDT 2015}
}