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Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers

Title
Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers
Authors
Soumyanarayanan, A.Raju, M.Oyarce, A.L.G.Tan, A.K.C.Im, M.-Y.Petrovic, A.P.Ho, P.Khoo, K.H.Tran, M.Gan, C.K.Ernult, F.Panagopoulos, C.
DGIST Authors
Im, M.-Y.
Issue Date
2017
Citation
Nature Materials, 16(9), 898-904
Type
Article
Article Type
Article
Keywords
Disordered LatticesFerromagnetic LayersInformation Storage TechnologyMagnetic InteractionsMagnetic MultilayersMagnetic StorageMagnetismMulti Layer FilmsMulti Layer StacksMulti LayersNanomagneticsSpin StructuresSub 100 nmX Ray Microscopy
ISSN
1476-1122
Abstract
Magnetic skyrmions are nanoscale topological spin structures offering great promise for next-generation information storage technologies. The recent discovery of sub-100-nm room-temperature (RT) skyrmions in several multilayer films has triggered vigorous efforts to modulate their physical properties for their use in devices. Here we present a tunable RT skyrmion platform based on multilayer stacks of Ir/Fe/Co/Pt, which we study using X-ray microscopy, magnetic force microscopy and Hall transport techniques. By varying the ferromagnetic layer composition, we can tailor the magnetic interactions governing skyrmion properties, thereby tuning their thermodynamic stability parameter by an order of magnitude. The skyrmions exhibit a smooth crossover between isolated (metastable) and disordered lattice configurations across samples, while their size and density can be tuned by factors of two and ten, respectively. We thus establish a platform for investigating functional sub-50-nm RT skyrmions, pointing towards the development of skyrmion-based memory devices.
URI
http://hdl.handle.net/20.500.11750/4430
DOI
10.1038/NMAT4934
Publisher
Nature Publishing Group
Files:
There are no files associated with this item.
Collection:
Emerging Materials ScienceETC1. Journal Articles


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