Stéphane Mangin

Stéphane Mangin

Professor

Université de Lorraine

Research Field: Energy efficient control of ultrafast spin current

Professor at Lorraine University and head of the Spintronic and Nanomagnetism team at IJL https://spin.ijl.cnrs.fr. He is a recognized expert in the fields of nanomagnetism and spintronic with 215 publications, more than 9000 citations and an h index of 46. he has 25 years of experience with magnetic nanostructures growth, processing and characterization. Its main fields of scientific expertise are magnetization manipulation at the nanometer scake using different stimulus (magnetic field, charge and spin current, heat and ultra-fast laser. Stephane Mangin is Fellow of the American Physical Society, Fellow of the IEEE Magnetic Society and Fellow at Churchill College – Cambridge (UK).

All Optical Magnetization Manipulation

S. Mangin a

a Université de Lorraine, Institut Jean Lamour, UMR CNRS 7198, France

During the last decade all-optical ultrafast magnetization switching in magnetic material thin film without the assistance of an applied external magnetic field has been explored [1,2]. It has been shown that femto-second light pulses can induce magnetization reversal in a large variety of magnetic materials [3,4]. However, so far, only certain particular ferrimagnetic thin films exhibit magnetization switching via a single femto-second optical pulse. All optical helicity dependent switching of a ferromagnetic layer could be demonstrated for a low number of pulses [5]. Recently the single-pulse switching of various magnetic material (ferrimagnetic, ferromagnetic) within a magnetic spin-valve structure have been demonstrated. Our experimental study reveals that the magnetization states are determined by spin-polarized currents generated by the light pulse interactions with the GdFeCo layer [6]. A detail study showing how spin-polarized currents are generated and how they interact with a Ferromagnetic (FM) layer can lead to magnetization switching will be presented [7,8]. Finally, magnetization dynamics measurement show that the reversal of the FM layer happens in less than one picosecond which can be modelled [9].

Reference:

[1] C. D. Stanciu, et al Phys. Rev. Lett. 2007, 99, 047601

[2] P. Scheid, et al J. Mag Mag Mat 169596 2022

[3] S. Mangin, et al, Nat. Mater. 2014, 13, 286

[4] C. -H. Lambert, et al Science 2014, 345, 1337

[5] G. Kichin, et al Phys. Rev. App. 12 (2), 024019 2019

[6] S. Iihama et al Adv Matter 1804004 2018

[7] Q. Remy, et al Adv. Sci. 2001996 2020

[8] J. Igarashi, et al Nano. Lett. 20, 12, 8654–8660 2020

[9] Q. Remy, et al under review 2022