Scientific highlights illustrated by key publications
- 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 ... - Synthesis of epitaxial monolayer Janus SPtSe (April 22nd, 2021)
Two-dimensional materials like graphene or transition metal dichalcogenides (TMDs) have attracted a lot of attention during the last decade for their original electronic properties intimately related to their 2D character and symmetries. At Spintec, the ... - Theoretical study of current induced domain wall motion in magnetic nanotubes with azimuthal magnetization (April 12th, 2021)
We report a theoretical overview of the magnetic domain wall behavior under an electric current in infinitely long nanotubes with azimuthal magnetization. We highlight effects that, besides spin-transfer torques already largely understood in flat strips, ... - Measurement of the Spin Absorption Anisotropy in Lateral Spin Valves (March 04th, 2021)
The spin absorption process in a ferromagnetic material depends on the spin orientation relatively to the magnetization. Using a ferromagnet to absorb the pure spin current created within a lateral spin valve, we evidence and ... - Independence of the Inverse Spin Hall Effect with the Magnetic Phase in Thin NiCu Films (February 25th, 2021)
Large spin Hall angles have been observed in 3d ferromagnetic materials, but their origin, and especially their link with the ferromagnetic order, remain unclear. Here, we investigated the evolution of the inverse spin Hall Effect ... - Review – Spin insulatronics (February 15th, 2021)
Arne Brataasa, Bart van Wees, Olivier Klein, Grégoire de Loubens, Michel Viret, Physics Reports 885, 1-27 (2020) Spin insulatronics covers efforts to generate, detect, control, and utilize high-fidelity pure spin currents and excitations inside magnetic insulators. ...
