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Fundamentals and Applications of Magnetic Materials$
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Kannan M. Krishnan

Print publication date: 2016

Print ISBN-13: 9780199570447

Published to Oxford Scholarship Online: December 2016

DOI: 10.1093/acprof:oso/9780199570447.001.0001

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Micromagnetic Imaging and Modeling

Micromagnetic Imaging and Modeling

(p.307) 8 Micromagnetic Imaging and Modeling
Fundamentals and Applications of Magnetic Materials

Kannan M. Krishnan

Oxford University Press

The imaging and quantitative evaluation of magnetic microstructures is a vibrant field with many complementary techniques, including those using electrons, photons, and scanning probes. Each technique has different experimental attributes and advantages in terms of spatial resolution, depth of information, time required for image acquisition, limitations on applied magnetic fields, and any specific requirements for imaging. They can be broadly classified into techniques that measure the stray field distribution around the samples, or those that measure either the sample induction or magnetization. Rapid advances have also been made in using polarized electrons and photons, with the latter exploiting element specificity of core–shell excitations. Interpretation of these images in terms of the underlying microstructure is the real challenge, but advances in micromagnetic modeling, using the Landau–Lifschitz–Gilbert equation, have enabled quantitative matching of experimental and computed images.

Keywords:   micromagnetic modeling, Landau–Lifschitz–Gilbert equation, magnetic force microscopy, Lorentz microscopy, electron holography, X-ray magnetic circular dichroism, scanning electron microscopy with polarization analysis, Bitter patterns, magneto-optical effect

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