Influence of Electron-Beam Annealing Duration on MgB2 Film Superconductivity
A novel method to fabricate Magnesium diboride ( MgB2) film by electron beam annealing was presented.The MgB2 thin films could be prepared in a second or sub-second without any toxic diborane gas,extra Mg vapor or argon gas.The method has the advantages of short formation time and high efficiency.Based on this,the relationship between MgB2 conductivity and electron beam annealing duration was investigated experimentally with an accelerating voltage of 40 × 103 V,a beam current of 3×10-3 A and different annealing durations of 0.1796s,1860s,0.2108s,0.2200s and 0.2332s.The experimental results showed the MgB2 film with 0.2200s has the highest Tc onset,the most dense structure and the strongest diamagnetic signal.Its zero-field Jc at 5 K was 5.0 × 106 A/cm2.Also the variation of the film superconducting properties with the annealing duration was found,it will provide an important reference for the preparation of high-quality MgB2 thin films.
MgB2 Superconducting thin film SiC substrate Electron beam annealing
Xiangdong Kong Qian Dai Li Han Qingrong Feng Mingzhang Chu Hong Xue Jianguo Li Furen Wang
Department of Micro-nano Fabrication Technology, Institute of Electrical Engineering, Chinese Academ School of Physics and State Key Laboratory for Artificial Microstructures and Mesoscopic Physics,Pek
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
255-260
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）