Scientific highlights illustrated by key publications
- Plaidoyer pour la spintronique (January 28th, 2022)
Les Échos publie la tribune de Victoire de Margerie, fondatrice et vice-présidente du World Materials Forum, portant sur la spintronique et la nécessité d’industrialiser cette technologie de rupture pour gérer l’accroissement de données en limitant ... - Room-temperature ferroelectric switching of spin-to-charge conversion in GeTe (November 30th, 2021)
The broken inversion symmetry of some semiconductors may allow for spin–charge interconversion, but its control by electric fields is volatile. This has led to interest in ferroelectric Rashba semiconductors, which combine semiconductivity, large spin–orbit coupling ... - Dzyaloshinskii–Moriya Interaction and Skyrmion States at 2D Materials/Co Interfaces (November 25th, 2021)
Significant Dzyaloshinskii–Moriya interaction (DMI) and perpendicular magnetic anisotropy (PMA) at interfaces comprising hexagonal boron nitride (h-BN) and cobalt (Co) remaining stable over a large range of Co film thickness are reported. Furthermore, it is demonstrated ... - A new spintronic memristive component for neuromorphic circuits (November 18th, 2021)
Neuromorphic computing is a bio-inspired technology which aims at mimicking the brain working principles. It can be used for fast and energy-efficient applications through the implementation of networks of artificial neurons and synapses. Artificial synapses ... - Spin diffusion length of thermal magnons (November 15th, 2021)
Using the spin Seebeck effect (SSE), we study the short-range propagation distance of thermally-induced spin currents inside insulator magnetic thin film. We find the spin diffusion length of thermal magnons (magnons carrying quanta of energy, ... - Penetration depth of Cooper pairs in antiferromagnets (October 11th, 2021)
Researchers at SPINTEC Grenoble, in collaboration with PHELIQS & CIME Grenoble and LOMA Bordeaux, demonstrated how the superconducting proximity effect can be used to evaluate the penetration of Cooper pairs in metallic antiferromagnets. These findings ... - Heavy ion irradiation effects on advanced Perpendicular Anisotropy Spin-Transfer Torque Magnetic Tunnel Junction (September 10th, 2021)
This study investigates heavy-ion irradiation effects on Perpendicular Magnetic Anisotropy Spin-Transfer Torque Magnetic Tunnel Junction devices (p-STT-MTJs). The radiative campaign took place at the Cyclotron Resource Centre of Université Catholique de Louvain (UCL). Designers of space ... - Time-resolved magnetic imaging of Œrsted-field effects in cylindrical nanowires (August 31st, 2021)
We have conducted time-resolved stroboscopic imaging of the magnetization dynamics in cylindrical nanowires subject to nanosecond pulses of electric current. These confirm the dramatic impact of the Œrsted field in the cylindrical geometry. Through a ... - Route towards efficient magnetization reversal driven by voltage control of magnetic anisotropy (July 06th, 2021)
Using a macrospin approach, we carried out a systematic analysis of the role of the voltage controlled magnetic anisotropy on the magnetization dynamics of nanostructures with out-of-plane magnetic anisotropy. Diagrams of the magnetization switching have ... - Current-driven domain wall dynamics in ferrimagnetic nickel-doped Mn4N films (June 07th, 2021)
We report very large spin transfer torque driven domain wall velocities, approaching 3000 m/s, in rare-earth free ferrimagnetic Mn4-xNixN thin films close to the angular momentum compensation point. We also observe a reversal of the ... - Review – Roadmap of spin-orbit torques (June 01st, 2021)
Q. Shao, P. Li, L. Liu, H. Yang, S. Fukami, A. Razavi, H. Wu, K. Wang, F. Freimuth, Y. Mokrousov, M. D. Stiles, S. Emori, A. Hoffmann, J. Åkerman, K. Roy, J.-P. Wang, S.-H. Yang, ... - Helium ions put skyrmions on the track (May 20th, 2021)
Magnetic skyrmions are local twists of the magnetization which hold promise as nm scale information carrier. Here we demonstrate that focused He+-ion irradiation can be used to create and guide skyrmions in magnetic tracks. ... - Sustainability analysis of perpendicular anisotropy magnetic memory and platinum substitution (May 11th, 2021)
Perpendicular anisotropy Magnetic Random Access Memory (MRAM) can contribute reduced power consumption in electronic circuits. These spintronic devices also rely on materials like Co, Pt and Ru, having associated supply risk or environmental impact. A ... - Single-shot all-optical switching of magnetisation in Tb/Co multilayer-based MTJ (May 04th, 2021)
Atomistic spin simulations have been carried out to study the probability of all-optical switching of multilayered thin films. Playing with the composition of the sample, the material parameters and the fluence of the laser ... - Giant Perpendicular Magnetic Anisotropy Enhancement in MgO-Based Magnetic Tunnel Junction by Using Co/Fe Composite Layer (April 26th, 2021)
Magnetic tunnel junctions with perpendicular anisotropy form the basis of the spin-transfer torque magnetic random-access memory (STT-MRAM), which is nonvolatile, fast, dense, and has quasi-infinite write endurance and low power consumption. Here, an alternative design ...
