Reduction of spin transfer by synthetic antiferromagnets
arXiv:cond-mat/0401483 · doi:10.1063/1.1757638
Abstract
Synthetic antiferromagnetic layers (SAF) are incorporated into spin transfer nanopillars giving a layer composition [Co(bottom)/Ru/Co(fixed)]/Cu/Co(free), where square brackets indicate the SAF. The Co(bottom) and Co(fixed) layers are aligned antiparallel (AP) by strong indirect exchange coupling through the Ru spacer. All three magnetic layers are patterned, so this AP alignment reduces undesirable dipole fields on the Co(free) layer. Adding the Co(bottom)/Ru layers reduces the spin polarization of the electron current passing through the nanopillar, leading to a decreased spin-torque per unit current incident on the Co(free) layer. This may be advantageous for device applications requiring a reduction of the effects of a spin-torque, such as nanoscale CPP-GMR read heads.
arXiv comment4 pages, 3 figures
References in corpus (4)
- Microwave Oscillations of a Nanomagnet Driven by a Spin-Polarized Current
- Current-driven Magnetization Reversal and Spin Wave Excitations in Co/Cu/Co Pillars
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Cited by in corpus (5)
- Thermal Effects on the Magnetic Field Dependence of Spin Transfer Induced Magnetization Reversal
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- An ultrafast image recovery and recognition system implemented with nanomagnets possessing biaxial magnetocrystalline anisotropy
- Current-induced switching in single ferromagnetic layer nanopillar junctions
- 3-dimensional distribution of spin-polarized current: application to (Cu/Co) pillar structures