Cycloidal versus skyrmionic states in mesoscopic chiral magnets

Abstract

When subjected to the interfacially induced Dzyaloshinskii-Moriya interaction, the ground state in thin ferromagnetic films with high perpendicular anisotropy is cycloidal. The period of this cycloidal state depends on the strength of the Dzyaloshinskii-Moriya interaction. In this work, we have studied the effect of confinement on the magnetic ground state and excited states, and we determined the phase diagram of thin strips and thin square platelets by means of micromagnetic calculations. We show that multiple cycloidal states with different periods can be stable in laterally confined films, where the period of the cycloids does not depend solely on the Dzyaloshinskii-Moriya interaction strength but also on the dimensions of the film. The more complex states comprising skyrmions are also found to be stable, though with higher energy.

arXiv comment8 pages, 10 figures

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Cited by in corpus (15)

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• Control and manipulation of a magnetic skyrmionium in nanostructures
• Effects of spatially engineered Dzyaloshinskii-Moriya interaction in ferromagnetic films
• Spin-Wave Spectrum in Magnetic Nanodot with Continuous Transition between Vortex, Bloch-type Skyrmion and Néel-type Skyrmion States
• Paths to collapse for isolated skyrmions in few-monolayer ferromagnetic films
• Dynamics of a magnetic skyrmionium driven by spin waves
• Nano-scale magnetic skyrmions and target states in confined geometries
• Controlled creation and stability of kπ-skyrmions on a discrete lattice
• Proposal for a micromagnetic standard problem for materials with Dzyaloshinskii-Moriya interaction
• Deflection of (anti)ferromagnetic skyrmions at heterochiral interfaces
• Field-tuned spin excitation spectrum of $k\pi$-skyrmion
• Skyrmions at the edge: Confinement effects in Fe/Ir(111)
• Localized spin waves in isolated $k\pi$ skyrmions
• The effect of boundary-induced chirality on magnetic textures in thin films
• Phase Transitions of Chiral Spin Textures via Dipolar Coupling in Multilayered Films with Interfacial DMI