1 ∕ f -type noise in a biased current perpendicular to the plane spin valve: A numerical study | Zendy

A. Rebei | Zendy; L. Berger | Zendy; R.W. Chantrell | Zendy; M. Covington | Zendy

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1 ∕ f -type noise in a biased current perpendicular to the plane spin valve: A numerical study

Author(s) -

A. Rebei,

L. Berger,

R.W. Chantrell,

M. Covington

Publication year - 2005

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.1851426

Subject(s) - physics , condensed matter physics , perpendicular , torque , noise (video) , spin polarization , spin transfer torque , polarization (electrochemistry) , spin (aerodynamics) , spin valve , amplitude , magnetic field , magnetization , optics , quantum mechanics , chemistry , geometry , electron , mathematics , artificial intelligence , computer science , image (mathematics) , thermodynamics

We add the spin momentum-transfer torque to the stochastic Landau–Lifshitz equation and use it to study the noise spectrum as a function of the current and easy axis field for configurations close to equilibrium. The current perpendicular to the plane structure is biased by a constant field perpendicular to the polarization axis of the pinned layer. We show that this structure can exhibit large 1∕f-type noise for frequencies in the microwave regime. This 1∕f noise is not due to the spin torque. The spin torque can only change the amplitude of the noise.

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