Nanoscale spin wave valve and phase shifter

TLDR

The method uses a nanomagnet placed on a magnonic waveguide, whose static magnetization direction controls the device function. Micromagnetic simulations show the device acts as a spin‑wave valve or phase shifter, enabling energy‑efficient, non‑volatile, miniaturized information carriers for spin‑wave logic.

Abstract

We have used micromagnetic simulations to demonstrate a method for controlling the amplitude and phase of spin waves propagating inside a magnonic waveguide. The method employs a nanomagnet formed on top of a magnonic waveguide. The function of the proposed device is controlled by defining the static magnetization direction of the nanomagnet. The result is a valve or phase shifter for spin waves, acting as the carrier of information for computation or data processing within the emerging spin wave logic architectures of magnonics. The proposed concept offers such technically important benefits as energy efficiency, non-volatility, and miniaturization.