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Title: Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers
Authors: Soumyanarayanan, Anjan
Raju, M.
Gonzalez Oyarce, A. L.
Tan, Anthony K. C.
Im, Mi-Young
Petrović, Alexander Paul
Ho, Pin
Khoo, K. H.
Tran, M.
Gan, C. K.
Ernult, F.
Panagopoulos, Christos
Keywords: Information storage
Magnetic properties and materials
Issue Date: 2017
Source: Soumyanarayanan, A., Raju, M., Gonzalez Oyarce, A. L., Tan, A. K. C., Im, M.-Y., Petrović, A. P., et al. (2017). Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers. Nature Materials, 16(9), 898–904.
Series/Report no.: Nature Materials
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.
ISSN: 1476-1122
DOI: 10.1038/nmat4934
Schools: School of Physical and Mathematical Sciences 
Rights: © 2017 Macmillan Publishers Limited, part of Springer Nature. This is the author created version of a work that has been peer reviewed and accepted for publication by Nature Materials, Macmillan Publishers Limited. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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