Berlin 2018 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 52: Poster II

MA 52.41: Poster

Donnerstag, 15. März 2018, 15:00–18:00, Poster C

Current-Induced Skyrmion Generation Through Morphological Phase Transitions in Chiral Ferromagnetic Heterostructures — Ivan Lemesh¹, Kai Litzius^2,3,4, Pedram Bassirian², •Nico Kerber^2,3, Daniel Heinze², Jakub Zazvorka², Felix Büttner¹, Lucas Caretta¹, Max Mann¹, Markus Weigand⁴, Simone Finizio⁵, Jörg Raabe⁵, Mi-Young Im^6,7, Mathias Kläui^2,3, and Geoffrey S. D. Beach¹ — ¹Department of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA — ²Institut für Physik, Johannes Gutenberg-University, 55128 Mainz, Germany — ³Graduate School of Excellence Materials Science in Mainz, 55128 Mainz, Germany — ⁴Max Planck Institute for Intelligent Systems, 70569 Stuttgart, Germany — ⁵Swiss Light Source, Paul Scherrer Institut, Villigen PSI CH-5232, Switzerland — ⁶Center for X-ray Optics, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA — ⁷Department of Emerging Materials Science, DGIST, Daegu 42988, Korea

The creation and current driven motion of magnetic skyrmions at room temperature was recently observed [1], but the key formation mechanisms are poorly understood. Here we show that in thin films pulsed currents can drive morphological phase transitions. Using high-resolution x-ray microscopy, we image the evolution of the spin texture with temperature and magnetic field, and demonstrate that transient Joule heating can drive the system across the stripe-skyrmion phase boundary. [1] Litzius, K. et al. Nat. Phys. 13, 170-175 (2017)