Speaker
Description
We investigate the internal structure of the domain walls (DWs) in Tm3Fe5O12 (TmIG) and TmIG/Pt bilayers and demonstrate their efficient manipulation by spin-orbit torques with velocities of up to 400 m/s and current threshold for DW flow of 5x10^6 A/cm^2. Pt current lines patterned on extended TmIG films allow controlling DW propagation and magnetization switching in selected regions. Scanning nitrogen-vacancy magnetometry reveals that the DWs of thin TmIG films are Néel walls with left-handed chirality, with the DW magnetization rotating towards an intermediate Néel-Bloch configuration upon deposition of Pt. These results indicate the presence of a sizable interfacial Dzyaloshinskii–Moriya interaction in TmIG, which leads to novel possibilities to control the formation of chiral spin textures in centrosymmetric magnetic insulators.
