Manipulation of the mutual synchronisation in a pair of spin-torque oscillators

Abstract : Spin torque oscillators have driven interest among other electronic microwaveoscillators notably for their high nonlinearity and agility. However although the fundamentalprinciples of those systems are well-understood, these are limited to the realisationof prototypes due to their poor performances in terms of emitted power and linewidth.One strategy to deal with those limitations consists in mutually synchronising several suchoscillators, which would increase the oscillating volume, thereby improving these characteristics and allowing the realisation of more complex structures. Despite the fact thatthe fundamental principle has been demonstrated, its implication are still far from beingperfectly understood. In this perspective we study the minimalistic network consisting ina pair of spin torque oscillators mutually coupled via their magneto-dipolar interaction.The originality of this work lies in the introduction of a microstrip antenna, which enablesthe generation a microwave signal and acts as a third "ideal" oscillator to probe the richdynamics of this system, which displays fundamental as well as applicative interests.
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Xavier Du Hamel de Milly. Manipulation of the mutual synchronisation in a pair of spin-torque oscillators. Other [cond-mat.other]. Université Paris-Saclay, 2017. English. ⟨NNT : 2017SACLS442⟩. ⟨tel-01687760⟩

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