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Journal of Physical Studies 21(4), Article 4801 [10 pages] (2017)
DOI: https://doi.org/10.30970/jps.21.4801 MUTUAL PHASE-LOCKING OF SPIN-TORQUE NANO-OSCILLATORS TAKING INTO ACCOUNT THE TECHNOLOGICAL SPREAD OF THEIR EIGEN PARAMETERSO. R. Sulymenko, O. V. Prokopenko
Taras Shevchenko National University of Kyiv, Faculty of Radio Physics, Electronics and Computer Systems, |
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Spin-torque nano-oscillators (STNOs) could be promising base elements for the electronics of the future; however, their technical characteristics including output microwave signal power and linewidth, phase noise and frequency stability must be improved before they are used in practical applications. The most promising way to enhance these STNOs' parameters and obtain the most efficient microwave STNO-based devices is to synchronize the nano-oscillators, which could result in an increase in their output power, a reduction of their linewidth and phase noise, an increase in the generated signal stability, etc. However, the synchronization of the STNOs is difficult due to their strong nonlinearity and non-isochronism and the limitations of their manufacturing technology, which at present time is characterized by a quite large spread of STNOs' eigen parameters. In this work, a numerical model of the mutual synchronization of an arbitrary number of weakly-coupled STNOs taking into account the technological spread of STNOs' parameters is presented. The use of this model for the case of two, three, five, ten, and twenty STNOs having various technological spreads of the oscillators' parameters is demonstrated. The obtained results could be important for the development and optimization of microwave devices based on phase-locked STNO arrays.
PACS number(s): 85.75.-d, 05.45.Xt, 07.57.Hm, 84.40.-x