Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Current-driven dynamics and inhibition of the skyrmion Hall effect of
  ferrimagnetic skyrmions in GdFeCo films   Magnetic skyrmions are swirling magnetic textures with novel characteristics
suitable for future spintronic and topological applications. Recent studies
confirmed the room-temperature stabilization of skyrmions in ultrathin
ferromagnets. However, such ferromagnetic skyrmions show undesirable
topological effect, the skyrmion Hall effect, which leads to their
current-driven motion towards device edges, where skyrmions could easily be
annihilated by topographic defects. Recent theoretical studies have predicted
enhanced current-driven behaviour for antiferromagnetically exchange-coupled
skyrmions. Here we present the stabilization of these skyrmions and their
current-driven dynamics in ferrimagnetic GdFeCo films. By utilizing
element-specific X-ray imaging, we find that the skyrmions in the Gd and FeCo
sublayers are antiferromagnetically exchange-coupled. We further confirm that
ferrimagnetic skyrmions can move at a velocity of ~50 m s-1 with reduced
skyrmion Hall angle, {\theta}SkHE ~20{\deg}. Our findings open the door to
ferrimagnetic and antiferromagnetic skyrmionics while providing key
experimental evidences of recent theoretical studies.

30
The categories of this paper are: q-alg
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat