2018/05/14 by Maxime Leroux, Matthew J. Stolt, Song Jin +3
Materials Science · Physics and Astronomy · #Chemical and Physical Properties of Materials #Crystal structure #Hall effect #Helicoid #Lattice (music) #Lattice constant #Magnetic properties of thin films #Mesoscopic physics #Skyrmion #Topological Materials and Phenomena #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1038/s41598-018-33560-2
published as Scientific Reports volume 8, Article number: 15510 (2018)
arxiv created 2018/05/14 · openalex created_date 2018/05/17 · openalex publication_date 2018/10/15 · arxiv updated 2019/05/06 · openalex updated_date 2026/08/06
Magnetic skyrmions are stable nanosized spin structures that can be displaced at low electrical current densities. Because of these properties, they have been proposed as building blocks of future electronic devices with unprecedentedly high information density and low energy consumption. The electrical detection of an ordered skyrmion lattice via the Topological Hall Effect (THE) in a bulk crystal, has so far been demonstrated only at cryogenic temperatures in the MnSi family of compounds. Here, we report the observation of a skyrmion lattice Topological Hall Effect near room temperature (276 K) in a mesoscopic lamella carved from a bulk crystal of FeGe. This region coincides with the skyrmion lattice location revealed by neutron scattering. We provide clear evidence of a re-entrant helicoid magnetic phase adjacent to the skyrmion phase, and discuss the large THE amplitude (5 nΩ.cm) in view of the ordinary Hall Effect.