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Magnon-driven domain-wall motion with the Dzyaloshinskii-Moriya interaction
Weiwei Wang1, Maximilian Albert1, Marijan Beg1
1Engineering and the Environment, University of Southampton, SO17 1BJ Southampton, United Kingdom.
Abstract:
We study domain-wall (DW) motion induced by spin waves (magnons) in the presence of the Dzyaloshinskii-Moriya interaction (DMI). The DMI exerts a torque on the DW when spin waves pass through the DW, and this torque represents a linear momentum exchange between the spin wave and the DW. Unlike angular momentum exchange between the DW and spin waves, linear momentum exchange leads to a rotation of the DW plane rather than a linear motion. In the presence of an effective easy plane anisotropy, this DMI induced linear momentum transfer mechanism is significantly more efficient than angular momentum transfer in moving the DW.
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