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Chin. Phys. B, 2014, Vol. 23(5): 057403    DOI: 10.1088/1674-1056/23/5/057403

Magnetic property improvement of niobium doped with rare earth elements

Jiang Taoa, He Fei-Sia, Jiao Feia, He Faa, Lu Xiang-Yanga, Zhao Kuia, Zhao Hong-Yunb, You Yu-Songb, Chen Linb
a State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China;
b Ningxia Orient Tantalum Industry Co., Ltd., Shizuishan 753000, China
Abstract  A new idea is proposed by the PKU group to improve the magnetic properties of the Type-Ⅱ superconductor niobium. Rare earth elements like scandium and yttrium are doped into ingot niobium during the smelting processes. A series of experiments have been done since 2010. The preliminary testing results show that the magnetic properties of niobium materials have changed with different doping elements and proportions while the superconductive transition temperature does not change very much. This method may increase the superheating magnetic field of niobium so as to improve the performance of the niobium cavity, which is a key component of SRF accelerators. A Tesla-type single-cell cavity made of scandium-doped niobium is being fabricated.
Keywords:  niobium      rare earth element      impurity      magnetization curve  
Received:  20 September 2013      Revised:  17 November 2013      Published:  15 May 2014
PACS:  74.70.Ad (Metals; alloys and binary compounds)  
  74.25.Op (Mixed states, critical fields, and surface sheaths)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11175008).
Corresponding Authors:  Jiao Fei     E-mail:
About author:  74.70.Ad; 74.25.Op

Cite this article: 

Jiang Tao, He Fei-Si, Jiao Fei, He Fa, Lu Xiang-Yang, Zhao Kui, Zhao Hong-Yun, You Yu-Song, Chen Lin Magnetic property improvement of niobium doped with rare earth elements 2014 Chin. Phys. B 23 057403

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