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Instability of skyrmions in magnetic fields

Mougel, Loic 1; Buhl, Patrick M.; Nemoto, Ryohei; Balashov, Timofey 1; Hervé, Marie 1; Skolaut, Julian 1; Yamada, Toyo Kazu; Dupé, Bertrand; Wulfhekel, Wulf 1
1 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)


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 B$_{c}$, where they are destroyed and the topological charge is annihilated. We estimate B$_{c}$ 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.

DOI: 10.1063/5.0013488
Zitationen: 7
Web of Science
Zitationen: 6
Zitationen: 9
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2020
Sprache Englisch
Identifikator ISSN: 0003-6951, 1077-3118
KITopen-ID: 1000122721
Erschienen in Applied physics letters
Verlag American Institute of Physics (AIP)
Band 116
Heft 26
Seiten Art.Nr. 262406
Nachgewiesen in Web of Science
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