Investigation into surface composition of nitrogen-doped niobium for superconducting RF cavities

doi:10.1088/1361-6528/abeb99

	Investigation into surface composition of nitrogen-doped niobium for superconducting RF cavities
	Yang,Li 1; Liu,Baiqi 2; Ye,Zongbiao 1; Yang,Chi 3; Wang,Zhijun 3; Chen,Bo 1; Chen,Jianjun 1; Sha,Peng 2; Dong,Chao 2; Zhu,Jie 4
刊名	Nanotechnology
	2021-03-23
卷号	32
关键词	niobium nitrogen doping trigonal precipitates depth profiling superconducting accelerator
ISSN号	0957-4484
DOI	10.1088/1361-6528/abeb99
通讯作者	Ye,Zongbiao()
英文摘要	Abstract Systematic analysis of the surface morphology, crystalline phase, chemical composition and elemental distribution along depth for nitrogen-doped niobium was carried out using different methods of characterization, including Scanning Electron Microscopy (SEM), Atomic-Force Microscopy (AFM), Grazing Incidence X-ray Diffraction (GIXRD), Rutherford Backscattering Spectrometry (RBS) and layer-by-layer X-ray Photoelectron Spectroscopy (XPS) analysis. The results showed that, after nitrogen doping, the surface was covered by densely distributed trigonal precipitates with an average crystallite size of 32?±?8 nm, in line with the calculation result (29.9 nm) of nitrogen-enriched β-Nb2N from GIXRD, demonstrating the phase composition of trigonal precipitates. The depth analysis through RBS and XPS indicated that β-Nb2N was dominant in the topmost 9.7 nm and extended to a depth of 575 nm, with gradually decreased content. In addition, the successive change along depth in the naturally oxidized states of niobium after nitrogen doping, was revealed. It was interesting to find that the oxygen diffusion depth could be moderately enhanced by the nitridation process. These results established the near-surface phase composition of nitrided niobium, which is of great significance in evaluating the effect of nitrogen doping and further understanding the Q improvement of the superconducting radio frequency cavities.
资助项目	Fundamental Research Funds for the Central Universities ; National Key R&D Program of China[2017YFE0301305] ; Sichuan Science and Technology Program[2020YFSY0007] ; National Natural Science Foundation of China[11875198] ; National Natural Science Foundation of China[11905151]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:0957-4484-32-24-ABEB99
资助机构	Fundamental Research Funds for the Central Universities ; National Key R&D Program of China ; Sichuan Science and Technology Program ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/120723]
专题	中国科学院合肥物质科学研究院
通讯作者	Ye,Zongbiao
作者单位	1.Key Laboratory of Radiation Physics and Technology, Ministry of Education, Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, People’s Republic of China 2.Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, People’s Republic of China 3.Institute for Advanced Study, Chengdu University, Chengdu 610106, People’s Republic of China 4.Science College, Guizhou Institute of Technology, Guiyang 550000, People’s Republic of China 5.Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China
推荐引用方式 GB/T 7714	Yang,Li,Liu,Baiqi,Ye,Zongbiao,et al. Investigation into surface composition of nitrogen-doped niobium for superconducting RF cavities[J]. Nanotechnology,2021,32.
APA	Yang,Li.,Liu,Baiqi.,Ye,Zongbiao.,Yang,Chi.,Wang,Zhijun.,...&Gou,Fujun.(2021).Investigation into surface composition of nitrogen-doped niobium for superconducting RF cavities.Nanotechnology,32.
MLA	Yang,Li,et al."Investigation into surface composition of nitrogen-doped niobium for superconducting RF cavities".Nanotechnology 32(2021).