Theory of magnetic field-stabilized compact skyrmions in thin film ferromagnets

Bernand-Mantel, A.; Fondet, A; Barnova, S.; Simon, T.M.; Muratov C.B.

Research article (journal) | Peer reviewed

Abstract

We present a micromagnetic theory of compact magnetic skyrmions under applied magnetic field that accounts for the full dipolar energy and the interfacial Dzyaloshinskii-Moryia interaction (DMI) in the thin-film regime. Asymptotic analysis is used to derive analytical formulas for the parametric dependence of the skyrmion size and rotation angle, as well as the energy barriers for collapse and bursting, two processes that lead to a finite skyrmion lifetime. We demonstrate the existence of a regime at low DMI, in which the skyrmion is stabilized by a combination of nonlocal dipolar interaction and a magnetic field applied parallel to its core, and discuss the conditions for an experimental realization of such field-stabilized skyrmions.

Details about the publication

JournalPhysical Review B
Volume2023
Article numberL161405
StatusPublished
Release year2023
Language in which the publication is writtenEnglish
DOI: 10.1103/PhysRevB.108.L161405
Link to the full texthttps://link.aps.org/doi/10.1103/PhysRevB.108.L161405
KeywordsSkyrmions; micromagnetism; magnetic thin films; bifurcation analysis; perturbative methods

Authors from the University of Münster

Simon, Theresa
Juniorprofessorship of Applied Mathematics (Prof. Simon)