Thresholding of the Elliott-Yafet spin-flip scattering in multi-sublattice magnets by the respective exchange energies.

ABSTRACT: How different microscopic mechanisms of ultrafast spin dynamics coexist and interplay is not only relevant for the development of spintronics but also for the thorough description of physical systems out-of-equilibrium. In pure crystalline ferromagnets, one of the main microscopic mechanism of spin relaxation is the electron-phonon (el-ph) driven spin-flip, or Elliott-Yafet, scattering. Unexpectedly, recent experiments with ferro- and ferrimagnetic alloys have shown different dynamics for the different sublattices. These distinct sublattice dynamics are contradictory to the Elliott-Yafet scenario. In order to rationalize this discrepancy, it has been proposed that the intra- and intersublattice exchange interaction energies must be considered in the microscopic demagnetization mechanism, t

SUBMITTER: Born A 

PROVIDER: S-EPMC7820427 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature