Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 12, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4896225
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Funding
- Graduate School of Excellence Materials Science in Mainz (MAINZ), Germany [GSC 266, Staudinger Weg 9, 55128]
- EU (IFOX) [NMP3-LA-2012 246102]
- EU (MASPIC) [ERC-2007-StG 208162]
- EU (WALL) [FP7-PEOPLE-2013-ITN 608031]
- DFG
- Research Center of Innovative and Emerging Materials
- EPSRC, UK [EP/I011668/1, EP/G005176/1, EP/K003127/1]
- Alexander von Humboldt Foundation CONNECT program
- EPSRC [EP/I011668/1, EP/K003127/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/K003127/1, EP/I011668/1] Funding Source: researchfish
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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 Neel-Brown model enables key parameters of the thermally induced spin-orbit torques-driven switching process to be estimated, such as the attempt frequency and the effective energy barrier. (C) 2014 AIP Publishing LLC.
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