Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session N54: Stability, Lifetime, and Nucleation of Skyrmions
11:30 AM–2:30 PM,
Wednesday, March 16, 2022
Room: McCormick Place W-476
Sponsoring Unit: GMAG
Chair: Claudia Mewes, University of Alabama
Abstract: N54.00011 : Optimizing skyrmion properties for technological applications: an atomistic perspective*
1:54 PM–2:30 PM
In this talk, I will present our recent works related to the optimization of skyrmion hosting materials and provide an atomistic insight into how skyrmion properties can be tuned. Our investigations are based on micromagnetic arguments as well as atomistic spin-dynamics simulations, carried out with our Spirit code . To obtain static properties, we perform LLG and GNEB simulations, which provide us the energy barrier and the corresponding saddle point structure, and combine those with HTST  calculations to determine the lifetime prefactor. Additionally, we perform LLG simulations to investigate the dynamics of skyrmions.
In a recent publication , we showed that going beyond the micromagnetic limit, i.e., introducing frustration of magnetic interactions as well as considering structural aspects, provides a bright outlook for lifetime dependence on the materials properties. Additionally, I will show that the skyrmion profile, i.e., the functional dependence of the magnetization on the position relative to the skyrmion core, has a tremendous influence on skyrmion lifetime, stability, and dynamics, and I will demonstrate how the skyrmion profile can be tuned to optimize skyrmion properties.
 Spirit spin simulation framework, spirit-code.github.io
 P. F. Bessarab et al., Phys. Rev. B 85, 184409 (2012)
 M. Hoffmann et al., Phys. Rev. Lett. 124, 247201 (2020)
*We acknowledge funding from the DARPA TEE program through grant MIPR (#HR0011831554) from DOI.
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