Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-10-17
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
This is a paper for the book Fluctuating Nonlinear Oscillators, editor Mark Dykman
Scientific paper
We explore how non-equilibrium noise affects spin-torque switching elements and oscillators. To do so we first discuss the deterministic dynamics of magnetic tunnel junctions, introducing a convenient set of slow and fast degrees of freedom. We then derive effective Langevin equation for the slowly varying energy of precessional orbit and introduce the corresponding energy noise and energy diffusion coefficient. This allows for the formulation of a Fokker-Planck equation for the energy density distribution. We use it to analyse switching time distribution as well as the shape of the optimal spin-current pulse, which minimizes Joule losses of a switch. Finally we derive a generic expression for the linewidth of a spin-torque oscillator and discuss its dependence on temperature, spin-current amplitude and other parameters.
Chudnovskiy Alexander L.
Dunn Tyler
Kamenev A. A.
No associations
LandOfFree
Dynamics of nano-magnetic oscillators does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Dynamics of nano-magnetic oscillators, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamics of nano-magnetic oscillators will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-319050