Engineering spin-orbit torque in Co/Pt multilayers with perpendicular magnetic anisotropy
arXiv:1510.00836 · doi:10.1063/1.4937443
Abstract
To address thermal stability issues for spintronic devices with a reduced size, we investigate spin-orbit torque in Co/Pt multilayers with strong perpendicular magnetic anisotropy. Note that the spin-orbit torque arises from the global imbalance of the spin currents from the top and bottom interfaces for each Co layer. By inserting Ta or Cu layers to strengthen the top-down asymmetry, the spin-orbit torque efficiency can be greatly modified without compromised perpendicular magnetic anisotropy. Above all, the efficiency builds up as the number of layers increases, realizing robust thermal stability and high spin-orbit-torque efficiency simultaneously in the multilayers structure.
References in corpus (4)
- Spin Transfer Torques
- Role of transparency of platinum-ferromagnet interface in determining intrinsic magnitude of spin Hall effect
- Enhancement of Pure Spin Currents in Spin Pumping Y3Fe5O12/Cu/metal Trilayers through Spin Conductance Matching
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- Emerging spintronics phenomena and applications
- Control of stripe domain wall magnetization in perpendicular anisotropy multilayers
- Field-free perpendicular magnetization switching through domain wall motion in Pt/Co/Cr racetracks by spin orbit torques with the assistance of accompanying Joule heating effect
- Boosting spin-orbit torque efficiency in spin-current generator/magnet/oxide superlattices
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- Determination of the spin Hall angle by the inverse spin Hall effect, device level ferromagnetic resonance, and spin torque ferromagnetic resonance: a comparison of methods
- Enhanced spin transfer torque in platinum/ferromagnetic-metal structures by optimizing the platinum thickness