This title appears in the Scientific Report :
2016
Please use the identifier:
http://dx.doi.org/10.1038/srep27146 in citations.
Please use the identifier: http://hdl.handle.net/2128/11831 in citations.
Switching of chiral magnetic skyrmions by picosecond magnetic field pulses via transient topological states
Switching of chiral magnetic skyrmions by picosecond magnetic field pulses via transient topological states
Magnetic chiral skyrmions are vortex like spin structures that appear as stable or meta-stable states in magnetic materials due to the interplay between the symmetric and antisymmetric exchange interactions, applied magnetic field and/or uniaxial anisotropy. Their small size and internal stability m...
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Personal Name(s): | Heo, Changhoon |
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Kiselev, Nikolai (Corresponding author) / Nandy, Ashis Kumar / Blügel, Stefan / Rasing, Theo | |
Contributing Institute: |
Quanten-Theorie der Materialien; IAS-1 JARA - HPC; JARA-HPC JARA-FIT; JARA-FIT Quanten-Theorie der Materialien; PGI-1 |
Published in: | Scientific reports, 6 (2016) S. 27146 |
Imprint: |
London
Nature Publishing Group
2016
|
DOI: |
10.1038/srep27146 |
PubMed ID: |
27273157 |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena Controlling Spin-Based Phenomena |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/11831 in citations.
Magnetic chiral skyrmions are vortex like spin structures that appear as stable or meta-stable states in magnetic materials due to the interplay between the symmetric and antisymmetric exchange interactions, applied magnetic field and/or uniaxial anisotropy. Their small size and internal stability make them prospective objects for data storage but for this, the controlled switching between skyrmion states of opposite polarity and topological charge is essential. Here we present a study of magnetic skyrmion switching by an applied magnetic field pulse based on a discrete model of classical spins and atomistic spin dynamics. We found a finite range of coupling parameters corresponding to the coexistence of two degenerate isolated skyrmions characterized by mutually inverted spin structures with opposite polarity and topological charge. We demonstrate how for a wide range of material parameters a short inclined magnetic field pulse can initiate the reliable switching between these states at GHz rates. Detailed analysis of the switching mechanism revealed the complex path of the system accompanied with the excitation of a chiral-achiral meron pair and the formation of an achiral skyrmion. |