Spin transport parameters of NbN thin films characterized by spin pumping experimentsopen access
- Authors
- Rogdakis, K.; Sud, A.; Amado, M.; Lee, C.M.; McKenzie-Sell, L.; Jeon, K. R; Cubukcu, M.; Blamire, M.G.; Robinson, J.W.A.; Cohen, L.F.; Kurebayashi, H.
- Issue Date
- Jan-2019
- Publisher
- American Physical Society
- Citation
- Physical Review Materials, v.3, no.1
- Journal Title
- Physical Review Materials
- Volume
- 3
- Number
- 1
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/63780
- DOI
- 10.1103/PhysRevMaterials.3.014406
- ISSN
- 2475-9953
- 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. © 2019 American Physical Society.
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Collections - College of Natural Sciences > Department of Physics > 1. Journal Articles
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