All-electrical detection of spin dynamics in magnetic antidot lattices by the inverse spin Hall effect

TL;DR

This paper demonstrates all-electrical detection of spin dynamics in magnetic antidot lattices using the inverse spin Hall effect, showing voltage signals that scale linearly with microwave power, advancing magnonics technology.

Contribution

It introduces an electrical detection method for spin dynamics in antidot lattices, validated by experiments and micromagnetic simulations, with implications for magnonics applications.

Findings

Voltage signals change sign upon field reversal.

Voltage output scales linearly with microwave power.

Detection method aligns with micromagnetic simulations.

Abstract

The understanding of spin dynamics in laterally confined structures on sub-micron length scales has become a significant aspect of the development of novel magnetic storage technologies. Numerous ferromagnetic resonance measurements, optical characterization by Kerr microscopy and Brillouin light scattering spectroscopy and x-ray studies were carried out to detect the dynamics in patterned magnetic antidot lattices. Here, we investigate Oersted-field driven spin dynamics in rectangular Ni80Fe20/Pt antidot lattices with different lattice parameters by electrical means and compare them to micromagnetic simulations. When the system is driven to resonance, a dc voltage across the length of the sample is detected that changes its sign upon field reversal, which is in agreement with a rectification mechanism based on the inverse spin Hall effect. Furthermore, we show that the voltage output scales linearly with the applied microwave drive in the investigated range of powers. Our findings have direct implications on the development of engineered magnonics applications and devices.