Numerical study of spin-torque oscillators with perpendicular-to-plane polarizer by using a Heuristic method

We searched solutions of the Landau-Lifshitz-Gilbert-Slonczewski equation of micromagnetism by using the Simulated Annealing algorithm. The solutions were expressed as a composition of perpendicular harmonic oscillations. For a spin-torque oscillator with perpendicular-to-plane polarizer and in-plan...

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Bibliographic Details
Main Authors: Pop, M.-I, Firastrau, I.
Format: Conference Proceeding
Language:English
Subjects:
Cost function
Equations
Magnetic fields
Magnetization
Mathematical model
Oscillators
Vectors
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Summary:We searched solutions of the Landau-Lifshitz-Gilbert-Slonczewski equation of micromagnetism by using the Simulated Annealing algorithm. The solutions were expressed as a composition of perpendicular harmonic oscillations. For a spin-torque oscillator with perpendicular-to-plane polarizer and in-plane magnetization free layer, both stable states and steady state oscillations of the free layer magnetization were obtained. A linear variation of the frequency oscillation with the current density was obtained. The approach presented is useful in exploring the behaviour of a spin-torque oscillator without imposing initial conditions for the free layer magnetization.
ISSN:1545-827X
2377-0678
DOI:10.1109/SMICND.2013.6688678