Frontiers of Physics in China

, Volume 1, Issue 1, pp 117–121 | Cite as

A Study on the Components of MgB2 Thick Film Prepared via HPCVD

  • Jia Zhang 
  • Guo Jing-pu 
  • Lu Ying 
  • Wang Xin-feng 
  • Chen Chin-ping 
  • Xu Jun 
  • Wang Xiao-nan 
  • Zhu Meng 
  • Feng Qing-rong 
Research Article

Abstract

Superconducting MgB2 thick film has been prepared via hybrid physical-chemical vapor deposition method on Al2O3 (0001) substrate by using B2H6 and magnesium ingot as raw materials reacted from 730 to 830°C for 40 min under 20 to 30 kPa. Its thickness is about 40 µm. The MgB2 thick film shows Tc (onset) = 39.0 K and Tc (0) = 37.2 K. X-ray diffraction pattern shows that the film grown along (101) direction has small amount of impurities of Mg and MgO. Scanning electron microscopy and energy dispersive X-ray spectroscopy indicated that these impurities existed indeed and were Mg rich. The MgO film was formed on the surface of the MgB2 thick film to further protect the sample from oxidation. We presented a new mechanism for the formation of the thick film.

Keywords

MgB2 film SEM image EDX X-ray diffraction pattern 

PACS numbers

74.62.Bf 74.70.Ad 74.78.-w 
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Copyright information

© Higher Education Press and Springer-Verlag 2006

Authors and Affiliations

  • Jia Zhang 
    • 1
  • Guo Jing-pu 
    • 1
  • Lu Ying 
    • 1
  • Wang Xin-feng 
    • 1
  • Chen Chin-ping 
    • 1
  • Xu Jun 
    • 1
  • Wang Xiao-nan 
    • 1
  • Zhu Meng 
    • 1
  • Feng Qing-rong 
    • 1
  1. 1.School of Physics and State Key Laboratory of Artificial Microstructure and Mesoscopic PhysicsPeking UniversityBeijingChina

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