| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Kumar, Raj
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Topics
Publications (13/13 displayed)
- 2024Wide-angle and polarization-insensitive perfect metamaterial absorbercitations
- 2023Control of skyrmion chirality in Ta/FeCoB/TaO$_x$ trilayers by TaO$_x$ oxidation and FeCoB thicknesscitations
- 2023Control of skyrmion chirality in Ta/FeCoB/TaO$_x$ trilayers by TaO$_x$ oxidation and FeCoB thicknesscitations
- 2023Tuning of Structural and Morphological Characteristics of V<sub>2</sub>O<sub>5</sub> Thin Films Using Low Energy 16 keV N + for Optical and Wetting Applicationscitations
- 2023Performance analysis of various training algorithms of deep learning based controllercitations
- 2022Investigation on Mechanical Durability Properties of High-Performance Concrete with Nanosilica and Copper Slagcitations
- 2022Platinum on Oxidized Graphene Sheets: A Bifunctional Electrocatalyst for Hydrogen Oxidation Reaction and Methanol Oxidation Reactioncitations
- 2021Impact of post annealing and hydrogen implantation on functional properties of Cu2O thin films for photovoltaic applicationscitations
- 2020Drying kinetics and acoustic properties of soft porous polymer materialscitations
- 2020Detection of crack in plywood using digital holography interferometry
- 2020Storage moduli and porosity of soft PDMS polyMIPEs can be controlled independently using thiol-ene click chemistrycitations
- 2019Nitrogen-Doped Cu2O Thin Films for Photovoltaic Applicationscitations
- 2019Settlement Analysis of Recycled Concrete Fine Aggregate Blended Soils using Geostudiocitations
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article
Control of skyrmion chirality in Ta/FeCoB/TaO$_x$ trilayers by TaO$_x$ oxidation and FeCoB thickness
Abstract
Skyrmions are magnetic bubbles with nontrivial topology envisioned as data bits for ultrafast and power efficient spintronic memory and logic devices. They may be stabilized in heavy metal/ferromagnetic/oxide trilayer systems. The skyrmion chirality is then determined by the sign of interfacial Dzyaloshinskii-Moriya interaction (DMI). Nevertheless, for apparently identical systems, there is some controversy about the DMI sign. Here we show that the degree of oxidation of the top interface and the thickness of the ferromagnetic layer play a major role. Using Brillouin light scattering measurements in Ta/FeCoB/TaO$_x$ trilayers, we have demonstrated a sign change of the DMI with the degree of oxidation of FeCoB/TaO$_x$ interface. Using polar magneto-optical Kerr effect microscopy, we consistently observed a reversal of the direction of current-induced motion of skyrmions with the oxidation level of TaOx, attributed to their chirality reversal. In addition, a second chirality reversal is observed when changing the FeCoB thickness, probably due to the proximity of the two FeCoB interfaces in the ultrathin case. By properly tuning the chirality of the skyrmion, the spin transfer and spin orbit torques combine constructively to enhance the skyrmion velocity. These observations thus allow envisioning an optimization of the material parameters producing highly mobile skyrmions in this system and could be extended to other stacks. This chirality control also enables a more versatile manipulation of skyrmions and paves the way towards multidirectional devices.