Skyrmion Lattice Topological Hall Effect near Room Temperature

Leroux, Maxime; Stolt, Matthew J.; Jin, Song; Pete, Douglas V.; Reichhardt, Charles; Maiorov, Boris

doi:10.1038/s41598-018-33560-2

Title: Skyrmion Lattice Topological Hall Effect near Room Temperature

Journal Article · Fri Oct 19 00:00:00 EDT 2018 · Scientific Reports

DOI:https://doi.org/10.1038/s41598-018-33560-2· OSTI ID:1480015

^[1]; Stolt, Matthew J. ^[2];

^[2]; Pete, Douglas V. ^[3]; Reichhardt, Charles ^[1];

^[1]

Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Centre for Integrated Nanotechnologies

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.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); LANL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)

Grant/Contract Number:: AC52-06NA25396; NA0003525; ECCS-1609585; DGE-1256259

OSTI ID:: 1480015

Report Number(s):: LA-UR-17-29194

Journal Information:: Scientific Reports, Vol. 8; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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