English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Forming individual magnetic biskyrmions by merging two skyrmions in a centrosymmetric nanodisk

MPS-Authors
/persons/resource/persons260482

Göbel,  Börge
Max Planck Institute of Microstructure Physics, Max Planck Society;

Mertig,  Ingrid
Max Planck Institute of Microstructure Physics, Max Planck Society;

External Resource
Fulltext (public)

s41598-019-45965-8.pdf
(Publisher version), 3MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Göbel, B., Henk, J., & Mertig, I. (2019). Forming individual magnetic biskyrmions by merging two skyrmions in a centrosymmetric nanodisk. Scientific Reports, 9: 9521. doi:10.1038/s41598-019-45965-8.


Cite as: http://hdl.handle.net/21.11116/0000-0009-1079-D
Abstract
When two magnetic skyrmions – whirl-like, topologically protected quasiparticles – form a bound pair, a biskyrmion state with a topological charge of NSk = ±2 is constituted. Recently, especially the case of two partially overlapping skyrmions has brought about great research interest. Since for its formation the individual skyrmions need to posses opposite in-plane magnetizations, such a biskyrmion cannot be stabilized by the Dzyaloshinskii-Moriya-interaction (DMI), which is the interaction that typically stabilizes skyrmions in non-centrosymmetric materials and at interfaces. Here, we show that these biskyrmions can be stabilized by the dipole-dipole interaction in centrosymmetric materials in which the DMI is forbidden. Analytical considerations indicate that the bound state of a biskyrmion is energetically preferable over two individual skyrmions. As a result, when starting from two skyrmions in a micromagnetic simulation, a biskyrmion is formed upon relaxation. We propose a scheme that allows to control this biskyrmion formation in nanodisks and analyze the individual steps.