Domain walls in antiferromagnets: The effect of Dzyaloshinskii–Moriya interactions

We investigate domain walls in antiferromagnets focusing on the effect of Dzyaloshinskii–Moriya interactions (DMIs). Using spin model simulations and analytical arguments within a continuum theory, we show that Dzyaloshinskii–Moriya interactions affect static as well as dynamic properties of the dom...

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Bibliographic Details
Published inJournal of applied physics Vol. 127; no. 22
Main Authors Conzelmann, Teo, Selzer, Severin, Nowak, Ulrich
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 14.06.2020
Subjects
Antiferromagnetism
Chirality
Computer simulation
Configurations
Domain walls
Ferromagnetism
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Summary:We investigate domain walls in antiferromagnets focusing on the effect of Dzyaloshinskii–Moriya interactions (DMIs). Using spin model simulations and analytical arguments within a continuum theory, we show that Dzyaloshinskii–Moriya interactions affect static as well as dynamic properties of the domain wall. For certain configurations of the DMI vectors, the DMI can either tilt the easy plane of the domain wall, an effect that leads to a reduced domain wall width, or it can favor a certain chirality of the domain wall. Depending on the DMI configuration, the DMI may lead to an increasing or decreasing domain wall velocity. The asymmetry of the domain wall velocity observed in ferromagnets subject to DMI cannot be found in antiferromagnetic systems.
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content type line 14
ISSN:0021-8979
1089-7550
DOI:10.1063/5.0009409