Dynamically stabilized magnetic skyrmions
Artikel i vetenskaplig tidskrift, 2015

Magnetic skyrmions are topologically non-trivial spin textures that manifest themselves as quasiparticles in ferromagnetic thin films or noncentrosymmetric bulk materials. So far attention has focused on skyrmions stabilized either by the Dzyaloshinskii-Moriya interaction (DMI) or by dipolar interaction, where in the latter case the excitations are known as bubble skyrmions. Here we demonstrate the existence of a dynamically stabilized skyrmion, which exists even when dipolar interactions and DMI are absent. We establish how such dynamic skyrmions can be nucleated, sustained and manipulated in an effectively lossless medium under a nanocontact. As quasiparticles, they can be transported between two nanocontacts in a nanowire, even in complete absence of DMI. Conversely, in the presence of DMI, we observe that the dynamical skyrmion experiences strong breathing. All of this points towards a wide range of skyrmion manipulation, which can be studied in a much wider class of materials than considered so far.

solitons

lattice

motion

torque

spin-waves

chiral magnet

Författare

Y. Zhou

Ezio Iacocca

Göteborgs universitet

Ahmad Awad

Göteborgs universitet

Randy K. Dumas

Göteborgs universitet

F. C. Zhang

H. B. Braun

Johan Åkerman

Göteborgs universitet

Nature Communications

2041-1723 (ISSN)

Vol. 6 Article nr. 8193-

Ämneskategorier

Fysik

DOI

10.1038/ncomms9193

Mer information

Skapat

2017-10-10