Generation of pulse trains by current-controlled magnetic mirrors

TL;DR

This paper demonstrates how current-controlled magnetic mirrors can generate and manipulate spin-wave pulse trains on a ferrite film, enabling advanced functionalities like spin-wave memory for logic applications.

Contribution

It introduces a numerical model for dynamically controlling magnetic mirror reflectivity to generate and manage spin-wave pulse trains.

Findings

Spin-wave packets are confined and partially transmitted through magnetic mirrors.

Dynamic control of mirror current modulates pulse train generation.

Potential applications in spin-wave logic and memory devices.

Abstract

The evolution of a spin-wave packet trapped between two direct current-carrying wires placed on the surface of a ferrite film is observed by Brillouin light scattering. The wires act as semi-transparent mirrors confining the packet. Because the spin-wave energy partially passes through these mirrors, trains of spin-wave packets are generated outside the trap. A numerical model of this process is presented and applied to the case when the current in the wires is dynamically controlled. This dynamical control of the mirror reflectivity provides new functionalities interesting for the field of spin-wave logic like that of a spin-wave memory cell.