Multiple Walker breakdowns in magnetic multilayers

Herein, we report an exotic domain-wall dynamics showing double Walker breakdowns in magnetic multilayer films composed of two magnetic layers. Such multiple Walker breakdowns are attributed to the internal magnetic dipole field, which is antisymmetric on the domain walls of the lower and upper magn...

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Bibliographic Details
Published in:Scientific reports 2022-02, Vol.12 (1), p.2307-2307, Article 2307
Main Authors: Moon, Joon, Yoon, Jaesung, Kim, Kitae, Lee, Seong-Hyub, Kim, Dae-Yun, Choe, Sug-Bong
Format: Article
Language:English
Subjects:
639/301/119/544
639/766/1130/2798
639/766/119/1001
Humanities and Social Sciences
Magnetic fields
Magnetic thin films
Magnetism
multidisciplinary
Science
Science (multidisciplinary)
Velocity
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Summary:Herein, we report an exotic domain-wall dynamics showing double Walker breakdowns in magnetic multilayer films composed of two magnetic layers. Such multiple Walker breakdowns are attributed to the internal magnetic dipole field, which is antisymmetric on the domain walls of the lower and upper magnetic layers. A micromagnetic simulation shows four phases of the domain-wall dynamics, which result in a phase diagram with the phase boundaries of the double Walker breakdown fields. Such double Walker breakdowns lead to two minima in the variation of the domain-wall velocity, as often observed experimentally.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-022-06275-8