"Magnetization Dynamics in Non-collinear Antiferromagnets"
Most information is ultimately stored on spins in magnetic materials. To overcome the limitations of ferromagnetic information devices, such as instability under magnetic fields and cross-talk between devices, antiferromagnets have recently attracted attention [1]. In particular, noncollinear antiferromagnets can strongly interact with current and light due to the topology of the band structure, which can be controlled by the spin configurations [2].
In this presentation, I will talk about the spin dynamics in Mn3Sn, a noncollinear antiferromagnetic Weyl semimetal. In the first part, the magnetization dynamics in Mn3Sn is discussed theoretically and analytically and a micromagnetic model for noncollinear antiferromagnets will be introduced. The model can be used to study antiferromagnetic non-uniform configurations on the micrometer scale. The second part focuses on the current-driven magnetization switching in Mn3Sn, which is mediated by thermal spin reconfiguration and the spin-orbit torque [3].
[1] S. A. Siddiqui et al., J. Appl. Phys. 128, 040904 (2020).
[2] T. Chen et al., Nat. Commun. 12, 572 (2021).
[3] M.-W. Yoo et al., APL Mater, 12, 081107 (2024).