Global analysis of frequency modulation experiments in a vortex oscillator
Source abstract
Abstract
Abstract Frequency modulation is performed on a vortex oscillator at various modulation frequencies and powers. A global analysis of the whole set of data is proposed, so that all experimental curves are described with the same four parameters. Three of these parameters describe the dependence of the instantaneous frequency with modulating current. This dependence appears significantly different from the frequency-current dependence observed in a quasi-static experiment. The discrepancy is ascribed to the different time scales involved, compared to the relaxation time of the vortex oscillator.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Characterization and Applications of Magnetic Nanoparticles · Magnetic properties of thin films · Microfluidic and Bio-sensing Technologies
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References (17)
Show source-provided references
1. Dynamics of two coupled vortices in a spin valve nanopillar excited by spin transfer torque10.1063/1.3553771 ↗
2. Time-resolved zero field vortex oscillations in point contacts10.1063/1.3170234 ↗
3. H.S. Choi, S.Y. Kang, S.J. Cho, I.-Y. Oh, M. Shin, H. Park, C. Jang, B.-C. Min, S.-I. Kim, S.-Y. Park, et al., Spin nano-oscillator-based wireless communication, Scientific Reports 4, 2014, http://dx.doi.org/10.1038/srep05486.10.1038/srep05486 ↗
4. Frequency modulation of spin-transfer oscillators10.1063/1.1875762 ↗
5. Combined frequency-amplitude nonlinear modulation: theory and applications10.1109/TMAG.2010.2046178 ↗
6. Nonlinear frequency and amplitude modulation of a nanocontact-based spin-torque oscillator10.1103/PhysRevB.81.140408 ↗
7. Frequency shift keying in vortex-based spin torque oscillators10.1063/1.3581099 ↗
8. Tunability versus deviation sensitivity in a nonlinear vortex oscillator10.1103/PhysRevB.88.024421 ↗
9. Parametric oscillator based on nonlinear vortex dynamics in low-resistance magnetic tunnel junctions10.1103/PhysRevB.84.144434 ↗
10. Haykin · 2001
11. Gyrotropic linear and nonlinear motions of a magnetic vortex in soft magnetic nanodots10.1063/1.2783272 ↗
12. An RF linear modulation circuit
13. R. Enderby, Direct fm modulated high frequency oscillator having selectively controllable frequency deviation sensitivity, us patent 3,916,344, October 28, 1975. URL 〈https://www.google.com/patents/US3916344〉.
14. Spin-torque oscillator linewidth narrowing under current modulation10.1063/1.3588038 ↗
15. Modulation of individual and mutually synchronized nanocontact-based spin torque oscillators10.1109/TMAG.2010.2096463 ↗
16. Frequency shift keying in vortex-based spin torque oscillators10.1063/1.3581099 ↗
17. Simulations and experiments toward high-data-transfer-rate readers composed of a spin-torque oscillator10.1109/TMAG.2011.2173560 ↗