Giant enhancement of spin pumping efficiency using Fe3Si ferromagnet

TL;DR

This paper demonstrates a twentyfold increase in spin current generation efficiency using Fe3Si, a Heusler-type ferromagnet, significantly advancing dynamical methods in spintronics for practical device applications.

Contribution

The study introduces Fe3Si as a novel ferromagnetic material that greatly enhances spin pumping efficiency in dynamical spin-current generation methods.

Findings

Spin current generation efficiency increased twenty times.

Fe3Si enables more practical spintronic devices.

Advancement in dynamical spin-current methods.

Abstract

Spincurrentronics, which involves the generation, propagation and control of spin currents, has attracted a great deal of attention because of the possibility of realizing dissipation-free information propagation. Whereas electrical generation of spin currents originally made the field of spincurrentronics possible, and significant advances in spin-current devices has been made, novel spin-current-generation approaches such as dynamical methods have also been vigorously investigated. However, the low spin-current generation efficiency associated with dynamical methods has impeded further progress towards practical spin devices. Here we show that by introducing a Heusler-type ferromagnetic material, Fe3Si, pure spin currents can be generated about twenty times more efficiently using a dynamical method. This achievement paves the way to the development of novel spin-based devices.