Title: Studies of the magnetic structure at the ferromagnet-antiferromagnet interface
Authors: Scholl, A ×
Nolting, F
Stohr, J
Luning, J
Seo, Jin Won
Locquet, Jean-Pierre
Fompeyrine, J
Anders, S
Ohldag, H
Padmore, HA #
Issue Date: 2001
Series Title: Journal of synchrotron radiation vol:8 issue:Part 2 pages:101-104
Conference: date:Univ Calif Berkeley, Lawrence Berkeley Lab, Berkeley, CA 94720 USA; Stanford Synchrotron Radiat Lab, Stanford, CA 94309 USA; IBM Corp, Almaden Res Ctr, Div Res, San Jose, CA 95120 USA; Univ Neuchatel, Inst Phys, CH-2000 Neuchatel, Switzerland; IBM Corp, Div Res, Zurich Res Lab, CH-8803 Ruschlikon, Switzerland; Univ Dusseldorf, Inst Appl Phys, D-40225 Dusseldorf, Germany
Abstract: Antiferromagnetic layers are a scientifically challenging component in magnetoelectronic devices, such as magnetic sensors in hard-disk heads, or magnetic random-access memory (RAM) elements. In this paper, it is shown that photoelectron emission microscopy (PEEM) is capable of determining the magnetic structure at the interface of ferromagnets and antiferromagnets with high spatial resolution (down to 20 nm). Dichroism effects at the L edges of the magnetic 3d transition metals, using circularly or linearly polarized soft X-rays from a synchrotron source, give rise to a magnetic image contrast. Images, acquired with the PEEM2 experiment at the Advanced Light Source, show magnetic contrast for antiferromagnetic LaFeO3, microscopically resolving the magnetic domain structure in an antiferromagnetically ordered thin film for the first time. Magnetic coupling between LaFeO3 and an adjacent Co layer results in a complete correlation of their magnetic domain structures. From field-dependent measurements, a unidirectional anisotropy resulting in a local exchange bias of up to 30 Oe in single domains could be deduced. The elemental specificity and the quantitative magnetic sensitivity render PEEM a perfect tool to study magnetic coupling effects in multilayered thin-film samples.
ISSN: 0909-0495
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Solid State Physics and Magnetism Section
Physical Metallurgy and Materials Engineering Section (-)
× corresponding author
# (joint) last author

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