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  4. Controlling the helicity of magnetic skyrmions in a beta-Mn-type high-temperature chiral magnet
 
research article

Controlling the helicity of magnetic skyrmions in a beta-Mn-type high-temperature chiral magnet

Karube, K.
•
Shibata, K.
•
White, J. S.
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October 11, 2018
Physical Review B

Magnetic helices and skyrmions in noncentrosymmetric magnets are representative examples of chiral spin textures in solids. Their spin swirling direction, often termed as the magnetic helicity and defined as either left handed or right handed, is uniquely determined by the Dzyaloshinskii-Moriya interaction (DMI) in fixed chirality host crystals. Thus far, there have been relatively few investigations of the DMI in metallic magnets as compared with insulating counterparts. Here, we focus on the metallic magnets Co8-xFexZn8Mn4 (0 <= x <= 4.5) with a beta-Mn-type chiral structure and find that, as x varies under a fixed crystal chirality, a reversal of magnetic helicity occurs at x(c) similar to 2.7. This experimental result is supported by a theory based on first-principles electronic structure calculations, demonstrating the DMI to depend critically on the electron band filling. Thus by composition tuning our work shows the sign change of the DMI with respect to a fixed crystal chirality to be a universal feature of metallic chiral magnets.

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Type
research article
DOI
10.1103/PhysRevB.98.155120
Web of Science ID

WOS:000447088600001

Author(s)
Karube, K.
Shibata, K.
White, J. S.
Koretsune, T.
Yu, X. Z.
Tokunaga, Y.
Ronnow, H. M.  
Arita, R.
Arima, T.
Tokura, Y.
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Date Issued

2018-10-11

Publisher

AMER PHYSICAL SOC

Published in
Physical Review B
Volume

98

Issue

15

Article Number

155120

Subjects

Materials Science, Multidisciplinary

•

Physics, Applied

•

Physics, Condensed Matter

•

Materials Science

•

Physics

•

real-space observation

•

lattice

•

dynamics

•

crystal

•

alloys

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LQM  
Available on Infoscience
December 13, 2018
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/152569
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