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Journal articles
Improved spectral stability in spin transfer nano-oscillators: single vortex versus coupled vortices dynamics
Abstract : We perform a comparative study of spin transfer induced excitation of the gyrotropic motion of a vortex core with either uniform or vortex spin polarizers. The microwave output voltage associated with the vortex dynamics, detected in both cases, displays a strong reduction of phase fluctuations in the case of the vortex polarizer, with a decrease of the peak linewidth by one order of magnitude down to 200kHz at zero field. A thorough study of rf emission features for the different accessible vortex configurations shows that this improvement is related to the excitation of coupled vortex dynamics by spin transfer torques.
Cited literature [40 references]
https://hal-cea.archives-ouvertes.fr/cea-01364272
Contributor : Dominique Girard <>
Submitted on : Monday, September 12, 2016 - 2:45:45 PM
Last modification on : Wednesday, September 16, 2020 - 5:00:13 PM
Long-term archiving on: : Tuesday, December 13, 2016 - 3:08:33 PM
Contributor : Dominique Girard <>
Submitted on : Monday, September 12, 2016 - 2:45:45 PM
Last modification on : Wednesday, September 16, 2020 - 5:00:13 PM
Long-term archiving on: : Tuesday, December 13, 2016 - 3:08:33 PM
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1501.07839v1.pdf
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