Giant enhancement of spin pumping efficiency using Fe3Si ferromagnet

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 Whereas electrical generation of spin currents originally made the field of spincurrentronics possible, and significant advances in spin-current devices has been made, novel spin-current-generation approaches such as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.

27pages, 4 figures, Supplemental Information

References in corpus (2)

• Epitaxial ferromagnetic Fe${}_3$Si/Si(111) structures with high-quality hetero-interfaces
• Temperature Dependence of Spin Hall Angle of Palladium

Cited by in corpus (8)

• Spin Hall magnetoresistance at Pt/CoFe2O4 interfaces and texture effects
• Absence of magnetic proximity effects in magnetoresistive Pt/CoFe2O4 hybrid interfaces
• Spin Hall magnetoresistance as a probe for surface magnetization in Pt/CoFe${}_2$O${}_4$ bilayers
• Spin transport and spin conversion in compound semiconductor with non-negligible spin-orbit interaction
• Search for alternative magnetic tunnel junctions based on all-Heusler stacks
• Dissipation due to pure spin-current generated by spin pumping
• Rashba semiconductor as spin Hall material: Experimental demonstration of spin pumping in wurtzite $n$-GaN:Si
• Site-resolved hyperfine and lattice dynamical properties of a single-crystal Fe3Si