Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dynamics of magnetic skyrmion clusters driven by spin-polarized current
  with a spatially varied polarization   Magnetic skyrmions are promising candidates for future information
technology. Here, we present a micromagnetic study of isolated skyrmions and
skyrmion clusters in ferromagnetic nanodisks driven by the spin-polarized
current with spatially varied polarization. The current-driven skyrmion
clusters can be either dynamic steady or static, depending on the spatially
varied polarization profile. For the dynamic steady state, the skyrmion cluster
moves in a circle in the nanodisk, while for the static state, the skyrmion
cluster is static. The frequency of the circular motion of skyrmion is also
studied. Furthermore, the dependence of the skyrmion cluster dynamics on the
magnetic anisotropy and Dzyaloshinskii-Moriya interaction is investigated. Our
results may provide a pathway to realize magnetic skyrmion cluster based
devices.

34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
17
The categories of this paper are: q-fin
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
5
The categories of this paper are: gr-qc
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th