caa a22 4500 528786423 20190713030957.0 cr unu---uuuuu 180924s2015 xx s 000 0 eng 10.3929/ethz-b-000104181 doi 10.1038/ncomms8836 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/104181 Nanoscale switch for vortex polarization mediated by Bloch core formation in magnetic hybrid systems [Elektronische Daten] [Phillip Wohlhüter, Matthew T. Bryan, Peter Warnicke, Sebastian Gliga, Stephanie E. Stevenson, Georg Heldt, Lalita Saharan, Anna K. Suszka, Christoforos Moutafis, Rajesh V. Chopdekar, Jörg Raabe, Thomas Thomson, Gino Hrkac, Laura J. Heyderman] Nat Commun Open access ethresearch Vortices are fundamental magnetic topological structures characterized by a curling magnetization around a highly stable nanometric core. The control of the polarization of this core and its gyration is key to the utilization of vortices in technological applications. So far polarization control has been achieved in single-material structures using magnetic fields, spin-polarized currents or spin waves. Here we demonstrate local control of the vortex core orientation in hybrid structures where the vortex in an in-plane Permalloy film coexists with out-of-plane maze domains in a Co/Pd multilayer. The vortex core reverses its polarization on crossing a maze domain boundary. This reversal is mediated by a pair of magnetic singularities, known as Bloch points, and leads to the transient formation of a three-dimensional magnetization structure: a Bloch core. The interaction between vortex and domain wall thus acts as a nanoscale switch for the vortex core polarization. Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 ethresearch Wohlhüter Phillip joint author Bryan Matthew T. joint author Warnicke Peter joint author Gliga Sebastian joint author Stevenson Stephanie E. joint author Heldt Georg joint author Saharan Lalita joint author Suszka Anna K. joint author Moutafis Christoforos joint author Chopdekar Rajesh V. joint author Raabe Jörg joint author Thomson Thomas joint author Hrkac Gino joint author Heyderman Laura J. joint author Nature Communications London : Nature Publishing Group 6, p. 7836 2041-1723 http://hdl.handle.net/20.500.11850/104181 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/104181 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Wohlhüter Phillip joint author ETHRESEARCH 700 1- Bryan Matthew T. joint author ETHRESEARCH 700 1- Warnicke Peter joint author ETHRESEARCH 700 1- Gliga Sebastian joint author ETHRESEARCH 700 1- Stevenson Stephanie E. joint author ETHRESEARCH 700 1- Heldt Georg joint author ETHRESEARCH 700 1- Saharan Lalita joint author ETHRESEARCH 700 1- Suszka Anna K. joint author ETHRESEARCH 700 1- Moutafis Christoforos joint author ETHRESEARCH 700 1- Chopdekar Rajesh V. joint author ETHRESEARCH 700 1- Raabe Jörg joint author ETHRESEARCH 700 1- Thomson Thomas joint author ETHRESEARCH 700 1- Hrkac Gino joint author ETHRESEARCH 700 1- Heyderman Laura J. joint author ETHRESEARCH 773 0- Nature Communications London : Nature Publishing Group 6, p. 7836 2041-1723 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access