Magnetic vortex as a ground state for micron-scale antiferromagnetic samples

Abstract

Here we consider micron-sized samples with any axisymmetric body shape and made with a canted antiferromagnet, like hematite or iron borate. We find that its ground state can be a magnetic vortex with a topologically non-trivial distribution of the sublattice magnetization $\vec{l}$ and planar coreless vortex-like structure for the net magnetization $\vec{M}$. For antiferromagnetic samples in the vortex state, in addition to low-frequency modes, we find high-frequency modes with frequencies over the range of hundreds of gigahertz, including a mode localized in a region of radius $\sim$ 30--40 nm near the vortex core.

20 pages, 1 figure

References in corpus (3)

• Fractional vortices and composite domain walls in flat nanomagnets
• Dynamic origin of azimuthal modes splitting in vortex-state magnetic dots
• Pairing of Solitons in Two-Dimensional S=1 Magnets

Cited by in corpus (6)

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• Micromagnetic modelling and imaging of vortex|merons structures in an oxide|metal heterostructure
• A route towards stable homochiral topological textures in A-type antiferromagnets
• 3D Analytical Model of Skyrmions and Skyrmion-like Structures in a Two-sublattice Antiferromagnet with Dzyaloshinskii-Moriya Interaction