Faster chiral versus collinear magnetic order recovery after optical excitation revealed by femtosecond XUV scattering.

ABSTRACT: While chiral spin structures stabilized by Dzyaloshinskii-Moriya interaction (DMI) are candidates as novel information carriers, their dynamics on the fs-ps timescale is little known. Since with the bulk Heisenberg exchange and the interfacial DMI two distinct exchange mechanisms are at play, the ultrafast dynamics of the chiral order needs to be ascertained and compared to the dynamics of the conventional collinear order. Using an XUV free-electron laser we determine the fs-ps temporal evolution of the chiral order in domain walls in a magnetic thin film sample by an IR pump - X-ray magnetic scattering probe experiment. Upon demagnetization we observe that the dichroic (CL-CR) signal connected with the chiral order correlator m_zm_x in the domain walls recovers signifi

SUBMITTER: Kerber N 

PROVIDER: S-EPMC7726566 | biostudies-literature | 2020 Dec

REPOSITORIES: biostudies-literature