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

Rogdakis, K; Sud, A; Amado, M; Lee, CM; McKenzie-Sell, L; Jeon, KR; Cubukcu, M; ... Kurebayashi, H; + view all (2019) Spin transport parameters of NbN thin films characterized by spin pumping experiments. Physical Review Materials , 3 (1) , Article 014406. 10.1103/PhysRevMaterials.3.014406. Green open access

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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.

Type: Article
Title: Spin transport parameters of NbN thin films characterized by spin pumping experiments
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevMaterials.3.014406
Publisher version: http://doi.org/10.1103/PhysRevMaterials.3.014406
Language: English
Additional information: This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Materials Science, Multidisciplinary, Materials Science, TORQUE
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/10067260
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