A Coherent Spin-Torque Nano-oscillator Excited by a Combined Out-of-Plane and In-Plane Spin Polarized Current

Title
A Coherent Spin-Torque Nano-oscillator Excited by a Combined Out-of-Plane and In-Plane Spin Polarized Current
Authors
이억재
Keywords
spin torque oscillator
Issue Date
2020-01
Publisher
Journal of the Korean Physical Society
Citation
VOL 76, NO 2-L100
Abstract
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 e ective damping (􀀀 eff ) in the coherent region, resulting from the torque competition from the two spin polarizers and the spatial variation of the anti-damping e ectiveness. This e ectively reduces the nonlinear coupling (v) between the amplitude and the phase uctuations.
URI
http://pubs.kist.re.kr/handle/201004/71180
ISSN
0374-4884
Appears in Collections:
KIST Publication > Article
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