Enhancement of Pure Spin Currents in Spin Pumping Y3Fe5O12/Cu/metal Trilayers through Spin Conductance Matching

Abstract

Spin transport efficiency in heterostructures depends on the spin conductances of each constituent and their interfaces. We report a comparative study of spin pumping in Y3Fe5O12/Cu/Pt and Y3Fe5O12/Cu/W trilayers. Surprisingly, the insertion of a Cu interlayer between Y3Fe5O12 and W substantially improves (over a factor of 4) the spin current injection into W while similar insertion between Y3Fe5O12 and Pt degrades the spin current. This is a consequence of a much improved Y3Fe5O12/Cu spin mixing conductance relative to that for Y3Fe5O12/W. This result implies the possibility of engineered heterostructures with matching spin conductances to enable optimal spin transport efficiency.

18 pages, 5 figures

References in corpus (3)

• Longitudinal Spin Seebeck Effect Free from the Proximity Nernst Effect
• Electrical detection of spin pumping due to the precessing magnetization of a single ferromagnet
• Scaling behavior of the spin pumping effect in ferromagnet/platinum bilayers

Cited by in corpus (12)

• Y3Fe5O12 Spin Pumping for Quantitative Understanding of Pure Spin Transport and Spin Hall Effect in a Broad Range of Materials
• Spin current generation from sputtered Y3Fe5O12 films
• Consistent microscopic analysis of spin pumping effects
• Simultaneous Optical and Electrical Spin-Torque Magnetometry with Stroboscopic Detection of Spin-Precession Phase
• Orbital Pumping in Ferrimagnetic Insulators
• Experimental and Numerical Understanding of Localized Spin Wave Mode Behavior in Broadly Tunable Spatially Complex Magnetic Configurations
• Electrical control of spin mixing conductance in a Y${}_3$Fe${}_5$O${}_{12}$/Platinum bilayer
• Theoretical analysis of FMR-driven spin pumping current and its properties via Self-Consistent Harmonic Approximation
• Magnetoresistive detection of perpendicular switching in a magnetic insulator
• Enhancement of spin mixing conductance in La${}_{0.7}$Sr${}_{0.3}$MnO${}_3$/LaNiO${}_3$/SrRuO${}_3$ heterostructures
• Suppression of Spin Pumping at Metal Interfaces
• Strain-Induced Enhancement of Spin Pumping in Pt/YIG Bilayers