6533b833fe1ef96bd129c3f1
RESEARCH PRODUCT
Spin-orbit torque-driven magnetization switching and thermal effects studied in Ta\CoFeB\MgO nanowires
R. Lo ConteS.-j. NohAndrei P. MihaiT. A. MooreT. SchulzChristopher H. MarrowsAleš HrabecMathias Kläuisubject
Angular momentumMaterials scienceCondensed Matter - Mesoscale and Nanoscale PhysicsPhysics and Astronomy (miscellaneous)Condensed matter physicsNanowireFOS: Physical sciences3. Good healthMagnetic fieldMagnetizationCondensed Matter::Materials ScienceMesoscale and Nanoscale Physics (cond-mat.mes-hall)ThermalTorqueCurrent (fluid)Spin-½description
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.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2014-09-01 |