| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Fabrication and characterization of Al-Mn superconducting films for applications in TES bolometers |
| Qing Yu(余晴)1,2, Yi-Fei Zhang(张翼飞)3, Chang-Hao Zhao(赵昌昊)1,2, Kai-Yong He(何楷泳)1,2, Ru-Tian Huang(黄汝田)1,2, Yong-Cheng He(何永成)1,2, Xin-Yu Wu(吴歆宇)1,2, Jian-She Liu(刘建设)1,2, and Wei Chen(陈炜)1,2,4,† |
1 Department of Microelectronics and Nanoelectronics, Tsinghua University, Beijing 100084, China;
2 Beijing National Research Center for Information Science and Technology, Beijing 100084, China;
3 Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China;
4 Tsinghua University Future Chip Technology Advanced Innovation Center, Beijing 100084, China |
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Abstract Superconducting transition edge sensor (TES) bolometers require superconducting films to have controllable transition temperatures Tc in different practical applications. The value of Tc strongly affects thermal conductivity and thermal noise performance of TES detectors. Al films doped with Mn (Al-Mn) of different concentrations can accomplish tunable Tc. A magnetron sputtering machine is used to deposit the Al-Mn films in this study. Fabrication parameters including sputtering pressure and annealing process are studied and their influences on Tc and superconducting transition width ΔTc are optimized. The Al-Mn films with Δ Tc below 1.0 mK for Tc in a range of 520 mK-580 mK are successfully fabricated.
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Received: 11 November 2020
Revised: 24 January 2021
Accepted manuscript online: 28 January 2021
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PACS:
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74.62.Dh
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(Effects of crystal defects, doping and substitution)
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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81.40.Ef
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(Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization)
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85.25.Oj
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(Superconducting optical, X-ray, and γ-ray detectors (SIS, NIS, transition edge))
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11653001 and 11653004). |
Corresponding Authors:
Wei Chen
E-mail: weichen@mail.tsinghua.edu.cn
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Cite this article:
Qing Yu(余晴), Yi-Fei Zhang(张翼飞), Chang-Hao Zhao(赵昌昊), Kai-Yong He(何楷泳), Ru-Tian Huang(黄汝田), Yong-Cheng He(何永成), Xin-Yu Wu(吴歆宇), Jian-She Liu(刘建设), and Wei Chen(陈炜) Fabrication and characterization of Al-Mn superconducting films for applications in TES bolometers 2021 Chin. Phys. B 30 077402
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