Joao Sampaio
Université Paris-Saclay
59 Papers
448 Citations
Joao Sampaio is an academic researcher from Université Paris-Saclay. The author has contributed to research in topics: Magnetic field & Domain wall (magnetism). The author has an hindex of 22, co-authored 56 publications. Previous affiliations of Joao Sampaio include Centre national de la recherche scientifique & Imperial College London.
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Papers
Skyrmions on the track
TL;DR: Magnetic skyrmions are nanoscale spin configurations that hold promise as information carriers in ultradense memory and logic devices owing to the extremely low spin-polarized currents needed to move them.
3.3K
Nucleation, stability and current-induced motion of isolated magnetic skyrmions in nanostructures
TL;DR: It is demonstrated by numerical investigations that an isolated skyrmion can be a stable configuration in a nanostructure, can be locally nucleated by injection of spin-polarized current, and can be displaced by current-induced spin torques, even in the presence of large defects.
1.9K
Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmions at room temperature.
Constance Moreau-Luchaire,Christoforos Moutafis,Christoforos Moutafis,Nicolas Reyren,Joao Sampaio,Carlos A. F. Vaz,N. Van Horne,Karim Bouzehouane,Karin Garcia,Cyrile Deranlot,Peter Warnicke,Phillip Wohlhüter,Phillip Wohlhüter,J.-M. George,Markus Weigand,Jörg Raabe,Vincent Cros,Albert Fert +17 more
TL;DR: This work designed cobalt-based multilayered thin thin metals in which the cobalt layer is sandwiched between two heavy metals and so provides additive interfacial Dzyaloshinskii-Moriya interactions (DMIs), which reach a value close to 2 mJ m(-2) in the case of the Ir|Co|Pt asymmetric multilayers.
1.2K
Current-induced skyrmion generation and dynamics in symmetric bilayers.
Aleš Hrabec,Aleš Hrabec,Joao Sampaio,Mohamed Belmeguenai,I. Gross,I. Gross,R. Weil,S. M. Chérif,Andrey Stashkevich,Andrey Stashkevich,Vincent Jacques,André Thiaville,Stanislas Rohart +12 more
TL;DR: It is shown that a pair of coupled skyrmions of opposite chiralities can be stabilized in a symmetric magnetic bilayer system by combining Dzyaloshinskii–Moriya interaction (DMI) and dipolar coupling effects and this results set the ground for emerging spintronic technologies where issues concerningSkyrmion stability, nucleation and propagation are paramount.
A magnetic synapse: multilevel spin-torque memristor with perpendicular anisotropy.
Steven Lequeux,Joao Sampaio,Vincent Cros,Kay Yakushiji,Akio Fukushima,Rie Matsumoto,Hitoshi Kubota,Shinji Yuasa,Julie Grollier +8 more
TL;DR: The first experimental achievement of a multilevel memristor compatible with spin-torque magnetic random access memories is shown and it is demonstrated that the magnetic synapse has a large number of intermediate resistance states, sufficient for neural computation.