A fast-sealing cavity enables niobium resonators to reach internal Q factors exceeding one million by limiting oxide regrowth at the metal-air interface.
Nb films grown on c-plane sapphire un- der similar conditions have been reported to adopt either [110]4,5 or [111]6,7 orientations
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Investigation of coherence of niobium-based resonators enabled by a fast-sealing microwave cavity
A fast-sealing cavity enables niobium resonators to reach internal Q factors exceeding one million by limiting oxide regrowth at the metal-air interface.