Tohoku-Lorraine Collaboration : Review paper on Spin-Transport Mediated Single-Shot AOS

Ultrafast control of thin film nanomagnets using femtosecond laser pulses has attracted considerable attention for future ultrafast and energy-efficient photo-spintronics storage=memory devices. Single femtosecond laser pulse magnetization switching without an applied external magnetic field has been recently observed on various metallic thin films. Herein, a recent understanding of the physical Read more…

New Nano Letter “Ab Initio Study of Helicity-Dependent Light-Induced Demagnetization: From the Optical Regime to the Extreme Ultraviolet Regime”

In collaboration with the “Laboratoire de physique et chimie théoriques” and the Max Born Institute, we theoretically investigated the effect of optical and extreme ultraviolet (XUV) circularly polarized femtosecond pulses on the magnetization dynamics of ferromagnetic materials. Relying on real-time time-dependent density functional theory, we demonstrated that the light induces Read more…

New Nano Letter “Engineering Single-Shot All-Optical Switching of Ferromagnetic Materials”

Thanks to the strong collaboration between Tohoku University,  we investigated single-shot all-optical magnetization switching in a GdFeCo/Cu/[CoxNi1–x/Pt] spin-valve structure. We demonstrated that the threshold fluence for switching both the GdFeCo and the ferromagnetic layer depends on the laser pulse duration and the thickness and the Curie temperature of the ferromagnetic Read more…

2020: 5 projects supported by the ANR

Spin Orbit Torque switching & THz (JCJC SPOTZ- CE24): Coordinated by Jon Gorchon UltraFast Opto-magneto-spintronics for Future Nanotechnologies (PRC UFO – CE09): Coordinated by Stéphane Mangin Wireless and Integrated multi-parameters SAW Sensors Technologies for Implementation of a digital TWIN for electrical machines (PRCE WISSTITWIN CE42): Coordinated by Abdelkrim Talbi (from Read more…

Paper in Advanced Science

In GdFeCo/Cu/CoPt spin valve, the ultrafast demagnetization of the ferrimagnetic GdFeCo alloy, generated by a single femtosecond laser pulse, is shown to generate enough spin current to switch the magnetization of the ferromagnetic CoPt multilayer. By increasing the Gd concentration, the CoPt switching is found to be more energy efficient. http://dx.doi.org/10.1002/advs.202001996 This work Read more…

L’exposition Magnétique au Palais de la découverte jusqu’au 29 Novembre 2020

L’exposition Magnétique invite le public à découvrir, par l’expérience, la manipulation et l’observation, les principes du magnétisme et ses effets à l’origine de nombreuses applications de notre quotidien : moteurs, cartes bancaires, chauffage par induction, éoliennes, train à lévitation… Elle répond à un grand nombre de questions sur le magnétisme Read more…

New Immersive experience: Virtual Daum

Virtual laboratory of the “Daum Tube”. The DAUM platform is a unique tool in Europe for growth and characterization of nanomaterials under ultrahigh vacuum analysis. It consists of a 70-meter long tube under ultra-high vacuum, onto which 28 high-precision instruments are connected. click for more information and video