Spin-orbit torque and spin pumping in YIG/Pt with interfacial insertion layers. (arXiv:1802.03865v1 [cond-mat.mtrl-sci])

//Spin-orbit torque and spin pumping in YIG/Pt with interfacial insertion layers. (arXiv:1802.03865v1 [cond-mat.mtrl-sci])

We experimentally investigate spin-orbit torque and spin pumping in Y$_3$Fe$_5$O$_{12}$(YIG)/Pt bilayers with atomically thin insertion layers at the interface. An ultrathin layer of Cu suppresses both spin-orbit torque and spin pumping, whereas an ultrathin 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.

Published in: "arXiv Material Science".

2018-02-13T19:59:27+00:00 February 13th, 2018|Categories: Publications|
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