Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 68: Poster 5

MA 68.10: Poster

Friday, March 24, 2017, 09:30–13:00, P2-OG4

First-principles calculations of chiral magnetic structures in multilayers: {Rh|Co|Pt} and {Pd|Co|Pt} — •Hongying Jia, Bernd Zimmermann, and Stefan Blügel — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich and JARA, D-52425 Jülich

The Dzyaloshinskii-Moriya interaction (DMI), which is an antisymmetric exchange interaction, plays an important role in determining the physical properties of surfaces and interfaces of low-dimensional metallic magnets, in particular for the formation of magnetic skyrmions.

Here, we determine the magnetic interaction parameters of the magnetic multilayers of {Rh|Co|Pt} and {Pd|Co|Pt} using first-principles calculations based on the full-potential linearized augmented plane-wave (FLAPW) method, which is implemented in the FLEUR code [1].

We find that the 4d (i.e. Rh and Pd) elements induce a DMI that partly cancels the large DMI produced by the heavy-metal Pt layer. Upon variation of the thickness of the Pt layer between one and five atomic layers, we investigate the interlayer exchange coupling between the magnetic Co layers. For the {Pd|Co|Pt} system, a RKKY-type oscillatory behavior between ferromagnetic and antiferromagnetic interactions is observed. The {Rh|Co|Pt} system has a qualitatively different behavior, where frustrations in between the Co layers lead to a non-collinear order along the c axis.

We acknowledge financial support from the MAGicSky Horizon 2020 European Research FET Open project (#665095).

[1] For the program description see http://www.flapw.de.