Local control of magnetic interface effects in chiral Ir| Co| Pt multilayers using Ga+ ion irradiation

Mark C.H. de Jong (Corresponding author), Mariëlle J. Meijer, Juriaan Lucassen, Jos van Liempt, Henk J.M. Swagten, Bert Koopmans, Reinoud Lavrijsen

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

19 Citaten (Scopus)
102 Downloads (Pure)

Samenvatting

In this work we investigate local tuning of the iDMI and perpendicular magnetic anisotropy (PMA) using focused Ga+ ion beam irradiation, in an Ir|Co|Pt multilayer system. We show that the magnitude of the interface contribution to both effects can be significantly reduced by the irradiation with Ga+ ions. This leads to a reduction by a factor of 2 of the domain wall energy density, while still preserving the Néel character of the domain walls. Hence, we postulate that Ga+ ion irradiation is an effective way to locally reduce the energy barrier for skyrmion nucleation, providing a novel pathway for targeted skyrmion nucleation in racetrack type devices.

Originele taal-2Engels
Artikelnummer064429
Aantal pagina's10
TijdschriftPhysical Review B
Volume105
Nummer van het tijdschrift6
DOI's
StatusGepubliceerd - 23 feb. 2022

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© 2022 American Physical Society.

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