Scaling effect of spin-torque nano-oscillators | Zendy

Xiaohui Chao | Zendy; Mahdi Jamali | Zendy; JianPing Wang | Zendy

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Scaling effect of spin-torque nano-oscillators

Author(s) -

Xiaohui Chao,

Mahdi Jamali,

JianPing Wang

Publication year - 2017

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4974014

Subject(s) - laser linewidth , condensed matter physics , oscillation (cell signaling) , torque , micromagnetics , magnetization , current density , spin (aerodynamics) , magnetization dynamics , noise (video) , physics , nano , materials science , magnetic field , chemistry , optics , quantum mechanics , laser , biochemistry , thermodynamics , artificial intelligence , computer science , image (mathematics)

We have investigated the impact of device size on the characteristics of spin-torque nano-oscillators by studying the frequency and linewidth of the oscillator as a function of current density utilizing micromagnetic simulations at room temperature. Upon reduction of the device size from 40 down to 10 nm, thermal noise flattens the frequency and linewidth trends with current density and lowers the threshold current density of the oscillation. The magnetization vector trajectories reveal that irregular oscillations exist in smaller devices. Our findings suggest that a 20 × 20 nm2 spin-torque oscillator could be a viable candidate for a magnetic read sensor

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