Journal
PHYSICAL REVIEW B
Volume 81, Issue 18, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.81.184413
Keywords
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Funding
- National Security Agency, Laboratory of Physical Sciences, Army Research Office, National Science Foundation [0726909]
- JSPS-RFBR [09-02-92114]
- Ukraine Academy of Science [VC 38/V 139-18]
- Russian Foundation for Basic Research and Ukraine Academy of Science
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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 nontrivial distribution of the sublattice magnetization (l) over right arrow and planar coreless vortexlike structure for the net magnetization (M) over right arrow. 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 similar to 30-40 nm near the vortex core.
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