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

Journal Article · Sat Mar 28 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4916093· OSTI ID:22399334

Ueltzhöffer, Timo; Schmidt, Christoph; Ehresmann, Arno ^[1]; Krug, Ingo ^[2]; Nickel, Florian; Gottlob, Daniel ^[2]

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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)

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.

• OSTI ID: 22399334
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 12; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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