Swift thermal steering of domain walls in ferromagnetic MnBi stripes
  We predict a fast domain wall (DW) motion induced by a thermal gradient across a nanoscopic ferromagnetic stripe of MnBi. The driving mechanism is an exchange torque fueled by magnon accumulation at the DWs. Depending on the thickness of the sample, both hot-to-cold and cold-to-hot DW motion directions are possible. The finding unveils an energy efficient way to manipulate DWs as an essential element in magnetic information processing such as racetrack memory. 
Alexander Sukhov, Levan Chotorlishvili, Arthur Ernst, Xabier   Zubizarreta, Sergey Ostanin, Ingrid Mertig, Eberhard K. U. Gr...
cond-mat.mtrl-sci