Lee, OukJae 2024-01-19T18:31:30Z 2024-01-19T18:31:30Z 2021-09-05 2020-01 0374-4884 https://pubs.kist.re.kr/handle/201004/119137 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 fields, approximately cancelling the average in-plane dipolar field. The STNO exhibits enhanced nonlinear effective damping (Gamma(eff)) in the coherent region, resulting from the torque competition from the two spin polarizers and the spatial variation of the anti-damping effectiveness. This effectively reduces the nonlinear coupling (upsilon) between the amplitude and the phase fluctuations. English KOREAN PHYSICAL SOC A Coherent Spin-Torque Nano-oscillator Excited by a Combined Out-of-Plane and In-Plane Spin Polarized Current Article 10.3938/jkps.76.97 1 JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.76, no.2, pp.97 - 100 JOURNAL OF THE KOREAN PHYSICAL SOCIETY 76 2 97 100 scie scopus kci ART002554675 000512111700001 2-s2.0-85078347513 Physics, Multidisciplinary Physics Article Spin transfer torque Spin torque nano-oscillator