Intrinsic synchronization of an array of spin-torque oscillators driven by the spin-Hall effect

Abstract

This paper micromagnetically studies the magnetization dynamics driven by the spin-Hall effect in a Platinum/Permalloy bi-layer. For a certain field and current range, the excitation of a uniform mode, characterized by a power with a spatial distribution in the whole ferromagnetic cross section, is observed. We suggest to use the ferromagnet of the bi-layer as basis for the realization of an array of spin-torque oscillators (STOs): the Permalloy ferromagnet will act as shared free layer, whereas the spacers and the polarizers are built on top of it. Following this strategy, the frequency of the uniform mode will be the same for the whole device, creating an intrinsic synchronization. The synchronization of an array of parallely connected STOs will allow to increase the output power, as necessary for technological applications.

arXiv comment7 pages, 4 figures

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Cited by in corpus (5)

• Controlling the synchronization properties of two dipolarly coupled vortex based spin-torque nano-oscillators by the intermediate of a third one
• Nanomagnetic logic with non-uniform states of clocking
• Mutual synchronization of nano-oscillators driven by pure spin current
• Effect of capping layer on spin-orbit torques
• Large Amplitude Spin-Hall Oscillations due to Field-like Torque