Article (Scientific journals)
Instability of skyrmions in magnetic fields
Mougel, Loic; Buhl, Patrick; Nemoto, Ryohei et al.
2020In Applied Physics Letters, 116 (26), p. 262406
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Keywords :
skyrmions; STM
Abstract :
[en] In this combined experimental and theoretical work, we report on the evolution of the skyrmion radius and its destruction in the system Co/Ru(0001) when an out-of-plane magnetic field is applied. At low fields, skyrmions are metastable and display an elliptical instability in which along the short axis, the spin texture approaches that of the spin-spiral phase and the long axis expands in order to go back to the spin-spiral ground state. At high fields, we observe round skyrmions of finite size up to the collapse field Bc, where they are destroyed and the topological charge is annihilated. We estimate Bc via numerical methods based on magnetization dynamics simulations parametrized by density functional theory calculations and compare it to experimental scanning tunneling microscopy observations obtained at ≈ ≈ 30 mK.
Disciplines :
Physics
Author, co-author :
Mougel, Loic
Buhl, Patrick ;  Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Nemoto, Ryohei
Balashov, Timofey
Hervé, Marie
Skolaut, Julian
Yamada, Toyo Kazu
Dupé, Bertrand  ;  Université de Liège - ULiège > Département de physique > Physique des matériaux et nanostructures
Wulfhekel, Wulf
Language :
English
Title :
Instability of skyrmions in magnetic fields
Publication date :
2020
Journal title :
Applied Physics Letters
ISSN :
0003-6951
eISSN :
1077-3118
Publisher :
AIP Publishing LLC
Volume :
116
Issue :
26
Pages :
262406
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 07 September 2020

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