Temporal and spatial attenuation of inertial spin waves driven by spin-transfer torques

TL;DR

This paper investigates how magnetic inertia influences the damping and attenuation of inertial spin waves driven by spin-transfer torques, offering a new method to measure inertial relaxation time.

Contribution

It reveals the role of magnetic inertia in modifying spin wave damping and attenuation, providing insights into inertial relaxation time measurement.

Findings

Magnetic inertia affects the damping factor and attenuating length of spin waves.

The dependence of damping and attenuation on current and frequency is altered by inertia.

A new method for probing inertial relaxation time is proposed.

Abstract

Magnetic damping induces the temporal and spatial decay of spin waves, characterized by the damping factor and attenuating length, both of which can be measured to determine various magnetic and spin-transport parameters. By investigating the dispersion and dissipation of inertial spin waves driven by spin-transfer torques, we find that magnetic inertia modifies the dependence of the damping factor and attenuating length on the electric current and spin wave frequency. This provides a valuable method for probing the inertial relaxation time.