Unraveling the role of dipolar versus Dzyaloshinskii-Moriya interactions in stabilizing compact magnetic skyrmions
Anne Bernand-Mantel, Cyrill B. Muratov, Theresa M. Simon
Abstract
We present a theoretical study of compact magnetic skyrmions in ferromagnetic films with perpendicular magnetic anisotropy that accounts for the full stray field energy in the thin film and low interfacial Dzyaloshinskii-Moriya interaction (DMI) regime. In this regime, the skyrmion profile is close to a Belavin-Polyakov profile, which yields analytical expressions for the equilibrium skyrmion radius and energy. The obtained formulas provide a clear identification of DMI and long-range dipolar interaction as two physical mechanisms determining skyrmion size and stability.
Topics & Concepts
SkyrmionPhysicsCondensed matter physicsMagnetDipoleSpintronicsFerromagnetismRADIUSDemagnetizing fieldEnergy (signal processing)Magnetic fieldField (mathematics)MagnetizationQuantum mechanicsComputer scienceComputer securityMathematicsPure mathematicsMagnetic properties of thin filmsMagnetic and transport properties of perovskites and related materialsPhysics of Superconductivity and Magnetism