This title appears in the Scientific Report :
2023
Room Temperature Skyrmions in Pt/Co/Ta multilayers
Room Temperature Skyrmions in Pt/Co/Ta multilayers
Magnetic skyrmions are topologically stabilized spin configurations on the nanoscale which makes them promising for next-generation information storage technologies and computing. [1,2] In magnetic multilay- ers, they can be stabilized at room temperature [3]. Skyrmions emerge due to an interplay be...
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Personal Name(s): | Montanez Huaman, Liz Margarita |
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Kentzinger, Emmanuel / Cortie, David / Ahrens, Valentin / Guasco, Laura / Keller, Thomas / Skoulatos, Markos / Becherer, Markus / Pütter, Sabine (Corresponding author) | |
Contributing Institute: |
Heinz Maier-Leibnitz Zentrum; MLZ JCNS-FRM-II; JCNS-FRM-II Streumethoden; JCNS-2 JCNS-4; JCNS-4 |
Imprint: |
2023
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Conference: | MLZ User Meeting, München (Germany), 2023-12-04 - 2023-12-05 |
Document Type: |
Conference Presentation |
Research Program: |
Materials – Quantum, Complex and Functional Materials Jülich Centre for Neutron Research (JCNS) (FZJ) |
Subject (ZB): | |
Publikationsportal JuSER |
Magnetic skyrmions are topologically stabilized spin configurations on the nanoscale which makes them promising for next-generation information storage technologies and computing. [1,2] In magnetic multilay- ers, they can be stabilized at room temperature [3]. Skyrmions emerge due to an interplay between several magnetic contributions. Among them the interfacial Dzyaloshinskii-Moriya Interaction (DMI) drives the spins into non-collinear orientation, while the perpendicular magnetic anisotropy (PMA) favours the out-of-plane orientation and the shape anisotropy prefers in-plane spin orientation. Polycrystalline[Pt(40Å)/Co(x)/Ta(19Å)]N multilayerswerefabricatedinamolecularbeamepitaxysetupby thermal deposition on oxidized Si(001) substrates with a buffer layer of 47 Å Ta and a 30 Å Pt cap layer. The Co film thickness was varied between 5 Å and 21 Å, the number of repetitions varied between 8 and 10. Mag- netic force microscopy measurements reveal the existence of skyrmions at a Co thickness between 9 Å and 17 Å. We discuss results obtained from magnetic hysteresis, transport and neutron reflectometry measurements. The latter have been performed with the neutron reflectometer Platypus at ANSTO, Australia.References[1] A. Fert, V. Cros, and J. Sampaio, Nature Nanotech 8, (2013) 152.[2] K. Raab, M.A. Brems, G. Beneke, et al., Nat Commun 13, (2022) 6982.[3] S. Woo, K. Litzius, B. Krüger, M.-Y. Im, L. Caretta, K. Richter et al., Nat. Mat. 15 (2016) 501 |