Regensburg 2019 – scientific programme
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MA: Fachverband Magnetismus
MA 42: Focus Session: Curvilinear magnetism
MA 42.4: Invited Talk
Thursday, April 4, 2019, 11:00–11:30, H38
Domain Wall Dynamics in Curved Geometries — •Robert M. Reeve1, Mohamad-Assaad Mawass1,2,3, Kornel Richter1, Andre Bisig1,2, Benjamin Krüger1, Markus Weigand2, Hermann Stoll1,2, Andrea Krone1, Florian Kronast3, Gisela Schütz2, and Mathias Kläui1 — 1Institute of Physics, Johannes Gutenberg-University Mainz — 2Max Plank Institute for Intelligent Systems, Stuttgart — 3Helmholtz-Zentum Berlin für Materialien und Energie
Curved geometries have recently raised significant interest due to novel effects occurring when the curvature of the geometry influences the spin dynamics which is highly relevant for shapeable spintronics applications [1]. One of the first curved geometries that has been intensively investigated is the ring geometry since it exhibits special switching properties and also it is an ideal playground to study confined spin structures such as domain walls [2] and it may be appropriate for technological applications such as MRAM. The special curved geometry of a ring allows one to use a fully flux-closure vortex state to store bits and to switch between states of opposite circulation using uniaxial fields [3], the concept of automation is used [4]. Automotion relies on energy gradients generated by geometrical gradients as implemented in varying curvature rings [5] where one can tailor the dynamics and in particular the domain wall velocities. [1] D. Makarov et al., Appl. Phys. Rev. 3, 011101 (2016) [2] M. Kläui et al., Reviews in J. Phys. Cond. Mat. 15, R985 (2003) & 20, 313001 (2008) [3] K. Richter et al., Phys. Rev. B 94, 024435 (2016) [4] M. Mawass et al., Phys. Rev. Appl. 7, 044009 (2017) [5] K. Richter et al., Phys. Rev. Appl. 5, 024007 (2016)