講演抄録/キーワード |
講演名 |
2019-10-09 15:00
Characterization of Nb films prepared by ultra-high vacuum sputtering system for qubit application ○Wei Qiu・Hirotaka Terai(NICT) SCE2019-23 エレソ技報アーカイブへのリンク:SCE2019-23 |
抄録 |
(和) |
We have developed low-loss coplanar waveguide (CPW) resonators, which can be applied to many applications, such as superconducting quantum bits (qubits) and microwave kinetic inductance detectors. To realize low-loss superconducting resonators, we introduced a dc magnetron sputtering system with an ultra-low background pressure below 8 ?10-8 Pa. In this research, we characterize superconducting Nb films as a low-loss material for a CPW resonator. The Nb film properties, such as the film resistivity , superconducting transition temperature Tc, residual resistance ratio (RRR), film stress, and surface morphology have been studied. We also evaluated the internal loss by measuring the S11 and S21 parameters from CPW resonators made of Nb films. |
(英) |
We have developed low-loss coplanar waveguide (CPW) resonators, which can be applied to many applications, such as superconducting quantum bits (qubits) and microwave kinetic inductance detectors. To realize low-loss superconducting resonators, we introduced a dc magnetron sputtering system with an ultra-low background pressure below 8 ?10-8 Pa. In this research, we characterize superconducting Nb films as a low-loss material for a CPW resonator. The Nb film properties, such as the film resistivity , superconducting transition temperature Tc, residual resistance ratio (RRR), film stress, and surface morphology have been studied. We also evaluated the internal loss by measuring the S11 and S21 parameters from CPW resonators made of Nb films. |
キーワード |
(和) |
superconducting / microwave / kinetic inductance / Niobium / polycrystalline / sputtering / loss / |
(英) |
superconducting / microwave / kinetic inductance / Niobium / polycrystalline / sputtering / loss / |
文献情報 |
信学技報, vol. 119, no. 219, SCE2019-23, pp. 7-10, 2019年10月. |
資料番号 |
SCE2019-23 |
発行日 |
2019-10-02 (SCE) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
著作権に ついて |
技術研究報告に掲載された論文の著作権は電子情報通信学会に帰属します.(許諾番号:10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
PDFダウンロード |
SCE2019-23 エレソ技報アーカイブへのリンク:SCE2019-23 |