16 Antiferromagnetic Skyrmions and Bimerons
453
Fig. 16.9. Overview of the different motion behaviors of an antiferromagnetic skyrmion. Note that
the black spot denotes the considered defect and the current density increases along the direction
of the arrow. Reprinted with permission from [67]. Copyright © 2019 American Physical Society.
Dzyaloshinskii-Moriya interaction constant. Reference [67] has systematically investigated the dynamic pinning and depinning processes of antiferromagnetic skyrmions
on a racetrack with different defects.
16.7 Summary
In this chapter, we have introduced and discussed the magnetization dynamics of
antiferromagnetic skyrmions and bimerons excited by currents and spatially nonuniform magnetic anisotropy. In addition, we have also proposed possible applications based on antiferromagnetic skyrmions and bimerons, and reviewed some
relevant results. We have shown that spin currents can create and drive the antiferromagnetic skyrmions and bimerons. Due to the cancellation of the Magnus force,
the antiferromagnetic skyrmion and bimeron will not show the skyrmion Hall effect,
so that they are ideal information carriers in racetrack-type memory. In addition, in
the synthetic antiferromagnetic bilayer structure, the skyrmion also does not show
the skyrmion Hall effect and moves along the driving force direction. Besides, we
have demonstrated that the antiferromagnetic skyrmion can be driven by a magnetic
anisotropy gradient. Also, we have studied the pinning and depinning processes of
453
Fig. 16.9. Overview of the different motion behaviors of an antiferromagnetic skyrmion. Note that
the black spot denotes the considered defect and the current density increases along the direction
of the arrow. Reprinted with permission from [67]. Copyright © 2019 American Physical Society.
Dzyaloshinskii-Moriya interaction constant. Reference [67] has systematically investigated the dynamic pinning and depinning processes of antiferromagnetic skyrmions
on a racetrack with different defects.
16.7 Summary
In this chapter, we have introduced and discussed the magnetization dynamics of
antiferromagnetic skyrmions and bimerons excited by currents and spatially nonuniform magnetic anisotropy. In addition, we have also proposed possible applications based on antiferromagnetic skyrmions and bimerons, and reviewed some
relevant results. We have shown that spin currents can create and drive the antiferromagnetic skyrmions and bimerons. Due to the cancellation of the Magnus force,
the antiferromagnetic skyrmion and bimeron will not show the skyrmion Hall effect,
so that they are ideal information carriers in racetrack-type memory. In addition, in
the synthetic antiferromagnetic bilayer structure, the skyrmion also does not show
the skyrmion Hall effect and moves along the driving force direction. Besides, we
have demonstrated that the antiferromagnetic skyrmion can be driven by a magnetic
anisotropy gradient. Also, we have studied the pinning and depinning processes of