Coupled atomistic spin-lattice simulations of ultrafast demagnetization in 3d ferromagnets.

ABSTRACT: Despite decades of research, the role of the lattice and its coupling to the magnetisation during ultrafast demagnetisation processes is still not fully understood. Here we report on studies of both explicit and implicit lattice effects on laser induced ultrafast demagnetisation of bcc Fe and fcc Co. We do this using atomistic spin- and lattice dynamics simulations following a heat-conserving three-temperature model. We show that this type of Langevin-based simulation is able to reproduce observed trends of the ultrafast magnetization dynamics of fcc Co and bcc Fe. The parameters used in our models are all obtained from electronic structure theory, with the exception of the lattice dynamics damping term, where a range of parameters were investigated. It was found that while the explicit sp

SUBMITTER: Pankratova M 

PROVIDER: S-EPMC10999457 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature