Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 15: Magnetism Poster A
MA 15.12: Poster
Tuesday, April 2, 2019, 10:00–13:00, Poster E
Dzyaloshinskii-Moriya Interaction using Spin-Spirals in First Principle Calculations — •Marius Weber1,2, Ashok Pokhrel1, Hans Christian Schneider2, Tim Mewes1, and Claudia Mewes1 — 1The University of Alabama, Tuscaloosa, USA — 2University of Kaiserslautern, Kaiserslautern, Germany
The Dzyaloshinskii-Moriya Interaction (DMI) is an anti-symmetric exchange interaction and plays a crucial role in the generation of magnetic skyrmions. In order to utilize the DMI one needs a system with broken inversion symmetry, which can be realized in bulk with inherent broken inversion symmetry or in asymmetric multilayer structures, where a ferromagnetic metal is sandwiched between two different non-magnetic metals with high spin orbit coupling. This work focuses on the analysis of the DMI vector in multilayer structures, such as Platinum/Cobalt/Iridium. The simulations employ first principles calculations based on Density Functional Theory (DFT) using the Vienna Ab initio Package (VASP). To determine the DMI vector we use a constrained simulation method and different spin spiral configurations [1,2]. Due to the anti-symmetric character of the DMI interaction one can extract the DMI contribution by comparing clockwise and anti-clockwise spin spiral configurations.
Part of this project was sponsored by NSF CAREER #1452670 and DARPA #D18AP00011. M. Weber would like to thank the MINT center for financial support.
[1] Yang et al., Phys. Rev. Lett. 115, 267210 (2015)
[2] Xiang et al., Phys, Rev. B 84, 224429 (2011)