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January 24, 2024

Multiferroic skyrmions in BiFeO 3

Phys. Rev. Research 5, 043109

We show here using atomistic simulations that BiFeO3 films can be driven through a topological transition when increasing uniaxial anisotropy, which can possibly be achieved by strain. Tuning the anisotropy close to the transition, we show that individual antiferromagnetic skyrmions can reach a very large topological protection. These entities can then be excited by electric fields and spin torque and controllably driven at speeds exceeding 10 km/s.

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