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Title: Skyrmion Lattice Topological Hall Effect near Room Temperature

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.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [2] ;  [3] ;  [1] ; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Wisconsin, Madison, WI (United States). Dept. of Chemistry
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States). Centre for Integrated Nanotechnologies
Publication Date:
Report Number(s):
LA-UR-17-29194
Journal ID: ISSN 2045-2322
Grant/Contract Number:
AC52-06NA25396; NA0003525; ECCS-1609585; DGE-1256259
Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States); Univ. of Wisconsin, Madison, WI (United States)
Sponsoring Org:
USDOE Office of Science (SC); USDOE National Nuclear Security Administration (NNSA); LANL Laboratory Directed Research and Development (LDRD) Program; National Science Foundation (NSF)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; magnetic properties and materials; materials for devices; spintronics; topological matter
OSTI Identifier:
1480015

Leroux, Maxime, Stolt, Matthew J., Jin, Song, Pete, Douglas V., Reichhardt, Charles, and Maiorov, Boris. Skyrmion Lattice Topological Hall Effect near Room Temperature. United States: N. p., Web. doi:10.1038/s41598-018-33560-2.
Leroux, Maxime, Stolt, Matthew J., Jin, Song, Pete, Douglas V., Reichhardt, Charles, & Maiorov, Boris. Skyrmion Lattice Topological Hall Effect near Room Temperature. United States. doi:10.1038/s41598-018-33560-2.
Leroux, Maxime, Stolt, Matthew J., Jin, Song, Pete, Douglas V., Reichhardt, Charles, and Maiorov, Boris. 2018. "Skyrmion Lattice Topological Hall Effect near Room Temperature". United States. doi:10.1038/s41598-018-33560-2. https://www.osti.gov/servlets/purl/1480015.
@article{osti_1480015,
title = {Skyrmion Lattice Topological Hall Effect near Room Temperature},
author = {Leroux, Maxime and Stolt, Matthew J. and Jin, Song and Pete, Douglas V. and Reichhardt, Charles and Maiorov, Boris},
abstractNote = {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.},
doi = {10.1038/s41598-018-33560-2},
journal = {Scientific Reports},
number = ,
volume = 8,
place = {United States},
year = {2018},
month = {10}
}

Works referenced in this record:

Spontaneous skyrmion ground states in magnetic metals
journal, August 2006
  • R��ler, U. K.; Bogdanov, A. N.; Pfleiderer, C.
  • Nature, Vol. 442, Issue 7104, p. 797-801
  • DOI: 10.1038/nature05056