Properties of skyrmions in Co/Pt-based multilayers from theory
ORAL
Abstract
We investigate the prospects for stable, compact 10 nm sized skyrmions in ferromagneically and antiferromagneticially coupled Co/Pt-based multilayers from first-principles calculation of the spin-stiffness, the Dzyaloshinskii-Moriya interaction (DMI), magnetic anisotropy and the interlayer coupling. Employing a multiscale approach, we transfer the microscopic parameters determined from ab initio to a micromagnetic energy functional and determine the skyrmion radius as function of temperature and film thickness. We found an analytical expression for the skyrmion radius that covers our numerical results and is valid for a large regime of micromagnetic parameters. We focus on monatomic layer thick fcc-stacked (111)-oriented metallic Z/Co/Pt (Z = 4d series: Y–Pd, the noble metals: Cu, Ag, Au, post-noble metals: Zn and Cd) and on systems of thicker layers.
*We acknowledge financial support from the DARPA TEE program through grant MIPR (Grant No. HR0011831554) from DOI, from Deutsche Forschungsgemeinschaft (DFG) through SPP 2137 “Skyrmionics” (Project No. BL 444/16), as well as computing resources on the supercomputer JURECA at the Jülich Supercomputing Centre and on the JARA partition of CLAIX at the RWTH Aachen University under Projects No. jias1f and No. jara0197, respectively.
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Presenters
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Stefan Bluegel
- Forschungszentrum Jülich
- Peter Grünberg Institute and Institute for Advance Simulation, Forschungszentrum Jülich and JARA
- Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich GmbH
- Peter Grünberg Institute (PGI-1), Forschungszentrum Jülich
- Peter Gruenberg Institut, Forschungszentrum Jülich
- Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA