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Article Dans Une Revue Applied Physics Letters Année : 2010

Amplitude and phase noise of magnetic tunnel junction oscillators

Bernard Dieny
Michel Prigent
Jean-Christophe Nallatamby
Raphaël Sommet

Résumé

The microwave emission linewidth of spin transfer torque nano-oscillators is closely related to their phase and amplitude noise that can be extracted from the magnetoresistive voltage signal V(t) using single shot time domain techniques. Here we report on phase and amplitude noise studies for MgO based magnetic tunnel junction oscillators. The analysis of the power spectral densities allows one to separate the linear and nonlinear contributions to the phase noise, the nonlinear contribution being due to the coupling between phase and amplitude. The coupling strength as well as the amplitude relaxation rate can be directly extracted.

Dates et versions

hal-00703948 , version 1 (04-06-2012)

Identifiants

Citer

M. Quinsat, Daria Gusakova, J.F Sierra, J.P. Michel, Dimitri Houssameddine, et al.. Amplitude and phase noise of magnetic tunnel junction oscillators. Applied Physics Letters, 2010, 97 (182507 (2010)), 3 p. ⟨10.1063/1.3506901⟩. ⟨hal-00703948⟩
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