Spin-orbit torque and spin pumping in YIG/Pt with interfacial insertion layers

Abstract

We experimentally investigate spin-orbit torque and spin pumping in Y${}_3$Fe${}_5$O${}_{12}$(YIG)/Pt bilayers with ultrathin insertion layers at the interface. An insertion layer of Cu suppresses both spin-orbit torque and spin pumping, whereas an insertion layer of Ni${}_{80}$Fe${}_{20}$ (permalloy, Py) enhances them, in a quantitatively consistent manner with the reciprocity of the two spin transmission processes. However, we observe a large enhancement of Gilbert damping with the insertion of Py that cannot be accounted for solely by spin pumping, suggesting significant spin-memory loss due to the interfacial magnetic layer. Our findings indicate that the magnetization at the YIG-metal interface strongly influences the transmission and depolarization of pure spin current.

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Cited by in corpus (9)

• Spin Pumping of an Easy-Plane Antiferromagnet Enhanced by Dzyaloshinskii-Moriya Interaction
• Magnetic properties and domain structure of ultrathin yttrium iron garnet/Pt bilayers
• Ferromagnetic Resonance Studies of Strain tuned Bi:YIG Films
• Charge-Spin Interconversion in Epitaxial Pt Probed by Spin-Orbit Torques in a Magnetic Insulator
• Calculating the spin memory loss at Cu$|$metal interfaces from first principles
• Damping enhancement in coherent ferrite/insulating-paramagnet bilayers
• Spin Hall magnetoresistance in Pt/Y${}_3$Fe${}_5$O${}_{12}$ bilayers grown on Si and Gd${}_3$Ga${}_5$O${}_{12}$ substrates
• PT-symmetry enabled spintronic thermal diode and logic gates
• Hybridization of Ferromagnetic and Cyclotron Resonances in a Two-Dimensional Electron System on a Ferromagnetic Film