Revealing the importance of interfaces for pure spin current transport

A Pfeier; R. M. Reeve; Kelvin Elphick; Atsufumi Hirohata; Mathias Klaui

doi:10.1103/PhysRevResearch.3.023110

Revealing the importance of interfaces for pure spin current transport

A Pfeier, R. M. Reeve, Kelvin Elphick, Atsufumi Hirohata, Mathias Klaui

Electronic Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Spin transport phenomena underpin an extensive range of spintronic eects.
In particular spin transport across interfaces occurs in most device concepts;
but is so far poorly understood. As interface properties strongly impact spin
transport, one needs to characterize and correlate them to the fabrication
method. Here we investigate pure spin current transport across interfaces
and connect this with imaging of the interfaces. We study the detection
of pure spin currents via the inverse spin Hall eect in Pt and the related
spin current absorption by Pt in Py-Cu-Pt lateral spin valves. Depending
on the fabrication process to pattern the Cu bridge, we either determine a
large (inverse) spin Hall eect signal and low spin absorption by Pt or vice
versa. We explain these counter-intuitive results by the fabrication induced
varying quality of the Cu/Pt interfaces, which is directly revealed via a special
scanning electron microscopy technique for buried interface imaging.

Original language	English
Article number	023110
Number of pages	11
Journal	Physical Review Research
Volume	3
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevResearch.3.023110
Publication status	Published - 10 May 2021

Bibliographical note

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10.1103/PhysRevResearch.3.023110Licence: CC BY

PhysRevResearch.3.023110
© 2021, The Author(s).
Final published version, 1.58 MBLicence: CC BY

Cite this

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title = "Revealing the importance of interfaces for pure spin current transport",

abstract = "Spin transport phenomena underpin an extensive range of spintronic eects.In particular spin transport across interfaces occurs in most device concepts;but is so far poorly understood. As interface properties strongly impact spintransport, one needs to characterize and correlate them to the fabricationmethod. Here we investigate pure spin current transport across interfacesand connect this with imaging of the interfaces. We study the detectionof pure spin currents via the inverse spin Hall eect in Pt and the relatedspin current absorption by Pt in Py-Cu-Pt lateral spin valves. Dependingon the fabrication process to pattern the Cu bridge, we either determine alarge (inverse) spin Hall eect signal and low spin absorption by Pt or viceversa. We explain these counter-intuitive results by the fabrication inducedvarying quality of the Cu/Pt interfaces, which is directly revealed via a specialscanning electron microscopy technique for buried interface imaging.",

author = "A Pfeier and Reeve, {R. M.} and Kelvin Elphick and Atsufumi Hirohata and Mathias Klaui",

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doi = "10.1103/PhysRevResearch.3.023110",

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T1 - Revealing the importance of interfaces for pure spin current transport

AU - Pfeier, A

AU - Reeve, R. M.

AU - Elphick, Kelvin

AU - Hirohata, Atsufumi

AU - Klaui, Mathias

PY - 2021/5/10

Y1 - 2021/5/10

N2 - Spin transport phenomena underpin an extensive range of spintronic eects.In particular spin transport across interfaces occurs in most device concepts;but is so far poorly understood. As interface properties strongly impact spintransport, one needs to characterize and correlate them to the fabricationmethod. Here we investigate pure spin current transport across interfacesand connect this with imaging of the interfaces. We study the detectionof pure spin currents via the inverse spin Hall eect in Pt and the relatedspin current absorption by Pt in Py-Cu-Pt lateral spin valves. Dependingon the fabrication process to pattern the Cu bridge, we either determine alarge (inverse) spin Hall eect signal and low spin absorption by Pt or viceversa. We explain these counter-intuitive results by the fabrication inducedvarying quality of the Cu/Pt interfaces, which is directly revealed via a specialscanning electron microscopy technique for buried interface imaging.

AB - Spin transport phenomena underpin an extensive range of spintronic eects.In particular spin transport across interfaces occurs in most device concepts;but is so far poorly understood. As interface properties strongly impact spintransport, one needs to characterize and correlate them to the fabricationmethod. Here we investigate pure spin current transport across interfacesand connect this with imaging of the interfaces. We study the detectionof pure spin currents via the inverse spin Hall eect in Pt and the relatedspin current absorption by Pt in Py-Cu-Pt lateral spin valves. Dependingon the fabrication process to pattern the Cu bridge, we either determine alarge (inverse) spin Hall eect signal and low spin absorption by Pt or viceversa. We explain these counter-intuitive results by the fabrication inducedvarying quality of the Cu/Pt interfaces, which is directly revealed via a specialscanning electron microscopy technique for buried interface imaging.

U2 - 10.1103/PhysRevResearch.3.023110

DO - 10.1103/PhysRevResearch.3.023110

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