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

2018/02/28 by Satoru Emori, Alexei Matyushov, Hyung‐Min Jeon +9 · 34 citations
Engineering · Materials Science · Physics and Astronomy · #Condensed matter physics #Magnetic Properties and Applications #Magnetic properties of thin films #Magneto-Optical Properties and Applications #Materials science #Nuclear physics #Physics #Quantum mechanics #Spin (aerodynamics) #Spin Hall effect #Spin polarization #Spin pumping #Thermodynamics #Torque #cond-mat.mtrl-sci

paper · pdf · doi:10.1063/1.5025623

published in Applied Physics Letters 112(18) (American Institute of Physics)

openalex created_date 2018/02/23 · arxiv created 2018/04/29 · openalex publication_date 2018/04/30 · arxiv updated 2018/05/07 · openalex updated_date 2026/08/05

Abstract

We experimentally investigate spin-orbit torque and spin pumping in Y3Fe5O12 (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 Ni80Fe20 (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.

Citations

• Spin Hall Magnetoresistance Induced by a Nonequilibrium Proximity Effect
• Impact of the interface quality of Pt/YIG(111) hybrids on their spin Hall magnetoresistance
• Spin-memory loss due to spin-orbit coupling at ferromagnet/heavy-metal interfaces: Ab initio spin-density matrix approach