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Spin transport parameters of NbN thin films characterised by spin pumping experiments

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Title: Spin transport parameters of NbN thin films characterised by spin pumping experiments
Authors: Rogdakis, K
Sud, A
Amado, M
Lee, CM
McKenzie-Sell, L
Jeon, KR
Cubukcu, M
Blamire, MG
Robinson, JWA
Cohen, L
Kurebayashi, H
Item Type: Journal Article
Abstract: We present measurements of ferromagnetic resonance driven spin pumping and inverse spin Hall effect in NbN/Y3Fe5O12 (YIG) bilayers. A clear enhancement of the (effective) Gilbert damping constant of the thin-film YIG was observed due to the presence of the NbN spin sink. By varying the NbN thickness and employing spin-diffusion theory, we have estimated the room-temperature values of the spin-diffusion length and the spin Hall angle in NbN to be 14 nm and −1.1×10−2, respectively. Furthermore, we have determined the spin mixing conductance of the NbN/YIG interface to be 10nm−2. The experimental quantification of these spin transport parameters is an important step towards the development of superconducting spintronic devices involving NbN thin films.
Issue Date: 14-Jan-2019
Date of Acceptance: 18-Dec-2018
URI: http://hdl.handle.net/10044/1/66838
DOI: https://dx.doi.org/10.1103/PhysRevMaterials.3.014406
ISSN: 2475-9953
Publisher: American Physical Society
Journal / Book Title: Physical Review Materials
Volume: 3
Copyright Statement: ©2019 American Physical Society
Sponsor/Funder: The Leverhulme Trust
Engineering & Physical Science Research Council (E
Engineering and Physical Sciences Research Council
Funder's Grant Number: RPG-2016-306
RG81276
EP/P030548/1
Keywords: Science & Technology
Technology
Materials Science, Multidisciplinary
Materials Science
TORQUE
Publication Status: Published
Article Number: 014406
Appears in Collections:Physics
Experimental Solid State
Faculty of Natural Sciences



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