Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of the antiferromagnetic skyrmion induced by a magnetic
  anisotropy gradient   The dynamics of antiferromagnets is a current hot topic in condensed matter
physics and spintronics. However, the dynamics of insulating antiferromagnets
cannot be excited by an electric current, which is a method usually used to
manipulate ferromagnetic metals. Here, we propose to use the voltage-controlled
magnetic anisotropy gradient as an excitation source to manipulate insulating
antiferromagnetic textures. We analytically and numerically study the dynamics
of an antiferromagnetic skyrmion driven by a magnetic anisotropy gradient. Our
analytical calculations demonstrate that such a magnetic anisotropy gradient
can effectively drive an antiferromagnetic skyrmion towards the area of lower
magnetic anisotropy. The micromagnetic simulations are in good agreement with
our analytical solution. Furthermore, the magnetic anisotropy gradient induced
velocity of an antiferromagnetic skyrmion is compared with that of a
ferromagnetic skyrmion. Our results are useful for the understanding of
antiferromagnetic skyrmion dynamics and may open a new way for the design of
antiferromagnetic spintronic devices.

34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
23
The categories of this paper are: solv-int
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph