A Coherent Spin-Torque Nano-oscillator Excited by a Combined Out-of-Plane and In-Plane Spin Polarized Current
- A Coherent Spin-Torque Nano-oscillator Excited by a Combined Out-of-Plane and In-Plane Spin Polarized Current
- spin torque oscillator
- Issue Date
- Journal of the Korean Physical Society
- VOL 76, NO 2-L100
- We present a coherent spin-torque nano-oscillator (STNO) with spectral linewidths 10 MHz
based on a nanopillar spin-valve device in which an in-plane magnetic free layer (FL) is excited by a combined out-of-plane and in-plane spin-polarized current under external magnetic elds, approximately cancelling the average in-plane dipolar eld. The STNO exhibits enhanced nonlinear eective damping (􀀀 eff ) in the coherent region, resulting from the torque competition from the two spin polarizers and the spatial variation of the anti-damping eectiveness. This eectively reduces the nonlinear coupling (v) between the amplitude and the phase uctuations.
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