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Title: Skyrmion Lattice Topological Hall Effect near Room Temperature

Abstract

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:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (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)
OSTI Identifier:
1480015
Report Number(s):
LA-UR-17-29194
Journal ID: ISSN 2045-2322
Grant/Contract Number:  
AC52-06NA25396; NA0003525; ECCS-1609585; DGE-1256259
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 8; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Material Science; skyrmion, Hall Effect,

Citation Formats

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., 2018. 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. Fri . "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},
issn = {2045-2322},
number = ,
volume = 8,
place = {United States},
year = {2018},
month = {10}
}

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Cited by: 3 works
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Figures / Tables:

Figure 1. Figure 1.: Nanofabrication of electrical transport sample by Focused Ion Beam (FIB). (a) Electron microscope picture. False colours: (yellow) lamella sample, (blue) FeGe single crystal, (green) FIB nanoprobe tip. FeGe lamella sample carved from a pyramidal FeGe single crystal, before final cut and lift-out with nanoprobe. The single crystal ismore » electrically grounded to the FIB sample holder with silver paint. (b) Lamella with platinum electrodes on silicon oxide chip. Final dimensions: 10 × 25 × 0.75 $μ$m3. The electrical current flows along [110] (see arrow) and the magnetic field is applied perpendicular to the flat face of the lamella along [001]. False colours: (yellow) lamella sample, (red) platinum contacts deposited by FIB, (light grey) evaporated platinum strips, (dark grey) silicon oxide chip.« less

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