Speaker: Elena Vedmedenko (University of Hamburg, host: Rózsa Levente)
Title: Boundary conditions for and ferromagnetic resonance spectra of magnetic bilayers coupled by interlayer Dzyaloshinskii-Moriya interactions
Date: Tuesday, 24 September 2024, 10:00
Place: Building 1, Conference room
Abstract:
Interfacial Dzyaloshinskii-Moriya interaction (IF-DMI) leads to non-collinear spin configurations within magnetic layers of multilayer heterostructures. Its interlayer counterpart (IL-DMI) minimizes chiral states between the layers. Here we show that the symmetries of these interactions are very different, although they both arise from pairwise exchange interactions between magnetic sites mediated by nonmagnetic atoms. Deriving new boundary conditions for the exchange operator and solving the associated boundary value problem, we show that unlike IF-DMI, which does not contribute to the FMR frequencies, IL-DMI alters the frequencies of fundamental FMR modes and can be separated from other contributions by an FMR experiment.
