Skyrmions in square-lattice antiferromagnets

R. Keesman, M. Raaijmakers, A.E. Baerends, G.T. Barkema, R.A. Duine

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36 Citations (Scopus)
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The ground states of square-lattice two-dimensional antiferromagnets with anisotropy in an external magnetic field are determined using Monte Carlo simulations and compared to theoretical analysis. We find a phase in between the spin-flop and spiral phase that shows strong similarity to skyrmions in ferromagnetic thin films. We show that this phase arises as a result of the competition between Zeeman and Dzyaloshinskii-Moriya interaction energies of the magnetic system. Moreover, we find that isolated (anti-)skyrmions are stabilized in finite-sized systems, even at higher temperatures. The existence of thermodynamically stable skyrmions in square-lattice antiferromagnets provides an appealing alternative over skyrmions in ferromagnets as data carriers.
Original languageEnglish
Article number054402
Pages (from-to)1-6
Number of pages6
JournalPhysical Review B
Publication statusPublished - 3 Nov 2016


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