Temporal behavior of the inverse spin Hall voltage in a magnetic insulator-nonmagnetic metal structure

TL;DR

This paper investigates the time-dependent inverse spin Hall voltage in a magnetic insulator-nonmagnetic metal system, revealing that secondary spin-wave modes at the interface cause distinct temporal behaviors compared to directly excited modes.

Contribution

It uncovers the role of long-lived secondary spin-wave modes in shaping the temporal profile of the inverse spin Hall voltage under pulsed microwave excitation.

Findings

Inverse spin Hall voltage exhibits different temporal behavior from directly excited spin waves.

Long-lived secondary spin-wave modes are localized at the insulator-metal interface.

Secondary modes significantly influence the voltage's temporal evolution.

Abstract

It is demonstrated that upon pulsed microwave excitation, the temporal behavior of a spin-wave induced inverse spin Hall voltage in a magnetic insulator-nonmagnetic metal structure is distinctly different from the temporal evolution of the directly excited spin-wave mode from which it originates. The difference in temporal behavior is attributed to the excitation of long-lived secondary spin-wave modes localized at the insulator-metal interface.