Scalable synchronization of spin-Hall oscillators in out-of-plane field

Abstract

A strategy for a scalable synchronization of an array of spin-Hall oscillators (SHOs) is illustrated. In detail, we present micromagnetic simulations of two and five SHOs realized by means of couples of triangular golden contacts on the top of a Pt/CoFeB/Ta trilayer. Results highlight that the synchronization occurs for the whole current region that gives rise to the excitation of self-oscillations. This is linked to the role of the magnetodipolar coupling, which is the phenomenon driving the synchronization when the distance between oscillators is not too large. Synchronization turns out to be also robust against geometrical differences of the contacts, simulated by considering variable distances between the tips ranging from 100nm to 200nm. Besides, it entails an enlargement of the radiation pattern that can be useful for the generation of spin-waves in magnonics applications. Simulations performed to study the effect of the interfacial Dzyaloshinskii-Moriya interaction show nonreciprocity in spatial propagation of the synchronized spin-wave. The simplicity of the geometry and the robustness of the achieved synchronization make this design of array of SHOs scalable for a larger number of synchronized oscillators.

References in corpus (14)

• Spin torque switching with the giant spin Hall effect of tantalum
• Spin Hall effect
• Magnetic switching by spin torque from the spin Hall effect
• Spin Transfer Torques
• Direct-Current Induced Dynamics in Co90Fe10/Ni80Fe20 Point Contacts
• Spin-Wave Propagation in the Presence of Interfacial Dzyaloshinskii-Moriya Interaction
• Spin Hall torque magnetometry of Dzyaloshinskii domain walls
• Spin transfer nano-oscillators
• Switching of a single ferromagnetic layer driven by spin Hall effect
• Spin-Hall Nano-oscillator: a micromagnetic study
• Model for a collimated spin wave beam generated by a single layer, spin torque nanocontact
• Power and linewidth of propagating and localized modes in nanocontact spin-torque oscillators
• Nanomagnetic logic with non-uniform states of clocking
• Mutual phase-locking in high frequency microwave nanooscillators as function of field angle

Cited by in corpus (5)

• Origin of temperature and field dependence of magnetic skyrmion size in ultrathin nanodots
• Micromagnetic modeling of Terahertz oscillations in an antiferromagnetic material driven by spin-Hall effect
• Configurational entropy of magnetic skyrmions as an ideal gas
• Theory of nonreciprocal spin waves excitation in spin-Hall oscillators with Dzyaloshinkii-Moriya interaction
• Large Amplitude Spin-Hall Oscillations due to Field-like Torque