Berlin 2018 – wissenschaftliches Programm
PRV IV: Preisträgervortrag
Donnerstag, 15. März 2018, 13:15–13:45, H 0105
Let's twist again -- Magnetic Skyrmions — •Karin Everschor-Sitte — Institute of Physics, Johannes Gutenberg University Mainz --- Laureate of the Hertha-Sponer-Prize
The magnetisation in simple ferromagnets is often rather unspectacular, as basically all magnetic moments are aligned in the same direction. However, in systems with competing interactions that favour different alignments of the magnetisation, more complicated textures can arise. Discovered experimentally in 2009, magnetic skyrmions exhibit a topologically nontrivial twist which gives rise to interesting physical properties and magnetisation dynamics well-suited for spintronic applications. Central challenges towards skyrmioncs include their efficient creation and manipulation. Within this talk I discuss how to reproducibly create and manipulate magnetic skyrmions with electric currents without the need for specialised setups. We demonstrate that it is possible to create skyrmions and other magnetic textures in ferromagnetic thin films in the absence of traditional chiral interactions. This allows for the coexistence of left and right handed skyrmions which dynamically twist into each other over and over again.