Spin-orbit torque-driven magnetization switching and thermal effects   studied in Ta\CoFeB\MgO nanowires
  We demonstrate magnetization switching in out-of-plane magnetized Ta\CoFeB\MgO nanowires by current pulse injection along the nanowires, both with and without a constant and uniform magnetic field collinear to the current direction. We deduce that an effective torque arising from spin-orbit effects in the multilayer drives the switching mechanism. While the generation of a component of the magnetization along the current direction is crucial for the switching to occur, we observe that even without a longitudinal field thermally generated magnetization fluctuations can lead to switching. Analysis using a generalized N\'eel-Brown model enables key parameters of the thermally induced spin-orbit torques switching process to be estimated, such as the attempt frequency and the effective energy barrier. 
R. Lo Conte (1,3), A. Hrabec (2), A. P. Mihai (2), T. Schulz (1),   S.-J. Noh (1), C. H. Marrows (2), T. A. Moore (2), and M...
cond-mat.mes-hall