Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers.
By Anjan Soumyanarayanan, M. Raju, A. L. Gonzalez Oyarce, Anthony K. C. Tan, M. Im, A. Petrović, P. Ho, K. Khoo, M. Tran, C. Gan and 2 more. Nature Materials, 2016
723 citations recorded by the source corpus.
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.
Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry
View Paper: https://www.semanticscholar.org/paper/6409c82e7a247394f720e88aba30510dab60b9ee
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Citations in the corpus
- Magnetic texture based magnonics (2020, background): “Skyrmions can be formed by DMI, and have been observed in intrinsic chiral magnets [60, 38, 366, 367, 368, 155] with bulk DMI and magnetic multilayers [369, 370] with interfacial DMI.”
- Very large Dzyaloshinskii-Moriya interaction in two-dimensional Janus manganese dichalcogenides and its application to realize skyrmion states (2019, background): “erromagnet and an adjacent layer with strong SOC. Notably, much effort has been devoted to grow multilayer stacks of ferromagnet/heavy metal (FM/HM) heterostructures, e.g., Ir/Co/Pt [15], Ir/Fe/Co/Pt [16] and Pt/Co/MgO [17] multilayers, in order to enhance the interfacial DMI [18]. Two-dimensional (”
- Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications (2019, background): “In 2017, Soumyanarayanan et al [31] found a tunable room-temperature skyrmion platform in the Ir/Fe/Co/Pt multilayer stacks for studying sub-50 nm skyrmions (see figure 4(f)), where one can adjust the magnetic interactions governing skyrmions by varying the ferromagnetic layer composition.”
- Beyond skyrmions: Review and perspectives of alternative magnetic quasiparticles (2020, background): “In multistack systems of magnetic and heavy metal materials, the effective DMI strength can be tuned [75] changing the size and the stability of Néel skyrmions [76].”