SKM 2021 – scientific programme

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MA: Fachverband Magnetismus

MA 12: INNOMAG e.V. Dissertationspreis / Ph.D. Thesis Prize (2021)

MA 12.2: Talk

Wednesday, September 29, 2021, 14:55–15:20, H2

Complex magnetism of nanostructures on surfaces: from orbital magnetism to spin excitations — •Sascha Brinker — Peter Grünberg Institut and Institute for Advanced Simulation, Forschungszentrum Jülich & JARA, 52425 Jülich, Germany — Department of Physics, RWTH Aachen University, D-52056, Aachen, Germany

Magnetic nanostructures deposited on surfaces not only offer a promising route towards the miniaturization of future information technology devices, but also serve as ideal prototypes to explore fundamental physics at the nanoscale. In this theoretical thesis, I explore a wide range of fundamental magnetic properties in this class of materials ranging from a new component to the orbital degrees of freedom, and a new chiral interaction, which is the biquadratic equivalent of the well-known Dzyaloshinskii-Moriya interaction, to the complex dependence of the so-called Gilbert damping, which can be observed for example in the spin excitation spectrum, on the non-collinear magnetic structure. The fundamental theoretical studies are complemented by fruitful collaborations with experimental colleagues using scanning tunneling microscopy. Theoretical methods were developed and applied to describe the magnetic stability of coupled nanostructures and the emergence of boundary states in magnetic chains proximity-coupled to a superconducting substrate.

This work was supported by the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (ERC Consolidator Grant No. 681405 DYNASORE).