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Title: Geometrically tailored skyrmions at zero magnetic field in multilayered nanostructures
Authors: Ho, Pin
Goolaup, S.
Soumyanarayanan, Anjan
Panagopoulos, Christos
Tan, Anthony K. C.
Huang, L. S.
Gonzalez Oyarce, A. L.
Raju, Masapogu
Keywords: Spintronics
Issue Date: 2019
Source: Ho, P., Tan, A. K. C., Goolaup, S., Gonzalez Oyarce, A. L., Raju, M., Huang, L. S., . . . Panagopoulos, C. (2019). Geometrically tailored skyrmions at zero magnetic field in multilayered nanostructures. Physical Review Applied, 11(2), 024064-. doi:10.1103/PhysRevApplied.11.024064
Series/Report no.: Physical Review Applied
Abstract: Magnetic skyrmions are chiral spin structures recently observed at room temperature in multilayer films. Their topological stability will enable high scalability in confined geometries—a sought-after attribute for device applications. Despite numerous theoretical studies examining sub-100-nm Néel skyrmions in nanostructures, in practice their ambient stability and evolution with confinement and their magnetic parameters remain to be established. Here we present the zero-field stabilization of sub-100-nm room-temperature Néel-textured skyrmions confined in Ir/Fe(x)/Co(y)/Pt nanodots over a wide range of magnetic and geometric parameters. The zero-field skyrmion size, here as small as approximately 50 nm, can be tailored by a factor of 4 with variation of dot size and magnetic interactions. Crucially, skyrmions with differing thermodynamic stability exhibit an unexpected dichotomy in confinement phenomenologies. These results establish skyrmion phenomenology in multilayer nanostructures, and prompt the synergistic use of magnetic and geometric parameters to achieve desired properties in devices.
DOI: 10.1103/PhysRevApplied.11.024064
Rights: © 2019 American Physical Society. All rights reserved. This paper was published in Physical Review Applied and is made available with permission of American Physical Society.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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