Chin. Phys. Lett.  2001, Vol. 18 Issue (5): 680-683    DOI:
Original Articles |
Structural Properties of MgB2 Superconductors with a Critical Current Density Greater than 105A/cm2
LI Jian-Qi1;LI Long1,2;ZHOU Yu-Qing1;REN Zhi-An1;CHE Guang-Can1;ZHAO Zhong-Xian1
1National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences, Beijing 100080 2Department of Physics, Ningxia University, Yinchuan 750021
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LI Jian-Qi, LI Long, ZHOU Yu-Qing et al  2001 Chin. Phys. Lett. 18 680-683
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Abstract Structural features of MgB2 superconductors prepared under different conditions have been analysed by means of transmission electron microscopy. The MgB2 crystal is identified to have a hexagonal structure with the space group of P6/mmm. Superconducting materials synthesized under a high pressure of 6 Gpa are made of regularly stacked grains as large as a few microns in sizes. Stacking faults and microstructure properties of grain boundaries either with or without impurities, appearing in a sample with the critical current density greater than 105A/cm2, have been systematically investigated.
Keywords: 74.62.Bf      74.60.-w      61.14.Lj      61.16.Bg     
Published: 01 May 2001
PACS:  74.62.Bf (Effects of material synthesis, crystal structure, and chemical composition)  
  74.60.-w  
  61.14.Lj  
  61.16.Bg  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2001/V18/I5/0680
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LI Jian-Qi
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ZHAO Zhong-Xian
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