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…

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…

“Optoelectronic domain-wall motion for logic computing” is out in APL

“Optoelectronic domain-wall motion for logic computing” was published in Applied Physics Letters (Vol.116, Issue 25) Logic computing in magnetic domain walls has been investigated using the interplay of all-optical helicity-dependent switching and current-induced spin-orbit torque switching. By simultaneously controlling current and laser pulses, logic functions of AND, OR, NAND and Read more…