Ultrafast time-evolution of chiral Neel magnetic domain walls probed by circular dichroism in x-ray resonant magnetic scattering.

ABSTRACT: Non-collinear spin textures in ferromagnetic ultrathin films are attracting a renewed interest fueled by possible fine engineering of several magnetic interactions, notably the interfacial Dzyaloshinskii-Moriya interaction. This allows for the stabilization of complex chiral spin textures such as chiral magnetic domain walls (DWs), spin spirals, and magnetic skyrmions among others. We report here on the behavior of chiral DWs at ultrashort timescale after optical pumping in perpendicularly magnetized asymmetric multilayers. The magnetization dynamics is probed using time-resolved circular dichroism in x-ray resonant magnetic scattering (CD-XRMS). We observe a picosecond transient reduction of the CD-XRMS, which is attributed to the spin current-induced coherent and incoherent torques withi

SUBMITTER: Leveille C 

PROVIDER: S-EPMC8931105 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature