JACoW is a publisher in Geneva, Switzerland that publishes the proceedings of accelerator conferences held around the world by an international collaboration of editors.
TY - CONF
AU - González Díaz-Palacio, I.
AU - Blick, R.H.
AU - Hillert, W.
AU - Wenskat, M.
AU - Zierold, R.
ED - Saito, Kenji
ED - Xu, Ting
ED - Sakamoto, Naruhiko
ED - Lesage, Ana
ED - Schaa, Volker R.W.
TI - ALD-Based NbIiN Studies for SIS R&D
J2 - Proc. of SRF2021, East Lansing, MI, USA, 28 June-02 July 2021
CY - East Lansing, MI, USA
T2 - International Conference on RF Superconductivity
T3 - 20
LA - english
AB - Superconductor-Insulator-Superconductor multilayers improve the performance of SRF cavities providing magnetic screening of the bulk cavity and lower surface resistance. In this framework NbTiN mixtures stand as a potential material of interest. Atomic layer deposition (ALD) allows for uniform coating of complex geometries and enables tuning of the stoichiometry and precise thickness control in sub-nm range. In this talk, we report about NbTiN thin films deposited by plasma-enhanced ALD on insulating AlN buffer layer. The deposition process has been optimized by studying the superconducting electrical properties of the films. Post-deposition thermal annealing studies with varying temperatures, annealing times, and gas atmospheres have been performed to further improve the thin film quality and the superconducting properties. Our experimental studies show an increase in T_{c} by 87.5% after thermal annealing and a maximum T_{c} of 13.9 K has been achieved for NbTiN of 23 nm thickness. Future steps include lattice characterization, using XRR/XRD/EBSD/PALS, and SRF measurements to obtain Hc1 and the superconducting gap.
PB - JACoW Publishing
CP - Geneva, Switzerland
SP - 109
EP - 111
KW - cavity
KW - site
KW - plasma
KW - SRF
KW - vacuum
DA - 2022/10
PY - 2022
SN - 2673-5504
SN - 978-3-95450-233-2
DO - doi:10.18429/JACoW-SRF2021-SUPFDV020
UR - https://jacow.org/srf2021/papers/supfdv020.pdf
ER -