Abstract
We present measurements of ferromagnetic resonance driven spin pumping and inverse spin Hall effect in (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 , respectively. Furthermore, we have determined the spin mixing conductance of the NbN/YIG interface to be . The experimental quantification of these spin transport parameters is an important step towards the development of superconducting spintronic devices involving NbN thin films.
3 More- Received 4 September 2018
- Revised 14 November 2018
DOI:https://doi.org/10.1103/PhysRevMaterials.3.014406
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