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Stochastic nature of magnetic processes studied by full-field soft X-ray microscopy

Title
Stochastic nature of magnetic processes studied by full-field soft X-ray microscopy
Authors
Im, Mi‐Young
DGIST Authors
Im, Mi‐Young
Issue Date
2018-11
Citation
Current Applied Physics, 18(11), 1174-1181
Type
Article
Article Type
Review
Author Keywords
Magnetic reversalMagnetic domain wallMagnetic vorticesSoft x-ray microscopyNanomaterials
Keywords
DOMAIN-WALLSHIFT REGISTERTHIN-FILMSRESOLUTIONDYNAMICSBEHAVIORFUTURE
ISSN
1567-1739
Abstract
In nanomagnetism, one of the crucial scientific questions is whether magnetic behaviors are deterministic or stochastic on a nanoscale. Apart from the exciting physical issue, this question is also of paramount highest relevance for using magnetic materials in a wealth of technological applications such as magnetic storage and sensor devices. In the past, the research on the stochasticity of a magnetic process has been mainly done by macroscopic measurements, which only offer ensemble-averaged information. To give more accurate answer for the question and to fully understand related underlying physics, the direct observation of statistical behaviors in magnetic structures and magnetic phenomena utilizing advanced characterization techniques is highly required. One of the ideal tools for such study is a full-field soft X-ray microscope since it enables imaging of magnetic structures on the large field of view within a few seconds. Here we review the stochastic behaviors of various magnetic processes including magnetization reversal process in thin films, magnetic domain wall motions in nanowires, and magnetic vortex formations in nanodisks studied by full-field soft X-ray microscopy. The origin triggering the stochastic nature witnessed in each magnetic process and the way to control the intrinsic nature are also discussed. © 2018 Korean Physical Society
URI
http://hdl.handle.net/20.500.11750/9373
DOI
10.1016/j.cap.2018.05.004
Publisher
Elsevier B.V.
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