Nanoconstriction spin-Hall oscillator with perpendicular magnetic anisotropy

TL;DR

This paper reports on the experimental development of spin-Hall nano-oscillators with perpendicular magnetic anisotropy, demonstrating their high tunability and large precession amplitudes for potential microwave circuit applications.

Contribution

It introduces a new type of spin-Hall nano-oscillator based on [Co/Ni] multilayers with perpendicular magnetic anisotropy, showing comparable current densities to in-plane devices.

Findings

Capable of single-frequency auto-oscillations

Exhibit large magnetization precession amplitudes

Frequency highly tunable by electric current

Abstract

We experimentally study spin-Hall nano-oscillators based on [Co/Ni] multilayers with perpendicular magnetic anisotropy. We show that these devices are capable of single-frequency auto-oscillations at current densities comparable to those in the in-plane magnetized oscillators. The demonstrated oscillators exhibit large magnetization precession amplitudes, and their oscillation frequency is highly tunable by the electric current. These features make them promising for applications in high-speed integrated microwave circuits.