中国物理B ›› 2008, Vol. 17 ›› Issue (3): 1124-1129.doi: 10.1088/1674-1056/17/3/062

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Rapid preparation of Mg(B1-xCx)2 superconductor using hybrid microwave method

郭娟, 董成, 高红, 闻海虎, 杨立红, 曾富, 陈红   

  1. National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences,Beijing & National Laboratory for Condensed Matter Physics, Beijing 100080, China
  • 收稿日期:2007-03-26 修回日期:2007-10-11 出版日期:2008-03-04 发布日期:2008-03-04
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 20271052 and 20571083) and the National Basic Research Program of China (Grant No 2006CB601004).

Rapid preparation of Mg(B1-xCx)2 superconductor using hybrid microwave method

Guo Juan(郭娟), Dong Cheng(董成)†, Gao Hong(高红), Wen Hai-Hu(闻海虎), Yang Li-Hong(杨立红), Zeng Fu(曾富), and Chen Hong(陈红)   

  1. National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences,Beijing & National Laboratory for Condensed Matter Physics, Beijing 100080, China
  • Received:2007-03-26 Revised:2007-10-11 Online:2008-03-04 Published:2008-03-04
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 20271052 and 20571083) and the National Basic Research Program of China (Grant No 2006CB601004).

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摘要： The crystal structure and the superconductivity for samples Mg(B1-xCx)2 (0 \le x \le 0.09) prepared by a hybrid microwave synthesis have been investigated. The starting material B10C is also obtained by using the microwave method. The carbon can distribute uniformly in the Mg(B1-xCx)2 samples because boron and carbon are mixed on an atomic scale in the staring material B10C. The dependences of both lattice parameters and superconducting transition temperature Tc on carbon content accord with those reported in the literature. The upper critical field Hc2 at 20K can be enhanced from about 4.3T for x=0 to 10\,T for x=0.05. The critical current density Jc of Mg(B0.95C0.05)2 is 1.05×104A/cm2 at 20K and 1T.

关键词: microwave synthesis, MgB2 superconductor, carbon doping

Abstract: The crystal structure and the superconductivity for samples Mg(B1-xCx)2 ($0 \le x \le 0.09$) prepared by a hybrid microwave synthesis have been investigated. The starting material B10C is also obtained by using the microwave method. The carbon can distribute uniformly in the Mg(B1-xCx)2 samples because boron and carbon are mixed on an atomic scale in the staring material B10C. The dependences of both lattice parameters and superconducting transition temperature Tc on carbon content accord with those reported in the literature. The upper critical field Hc2 at 20K can be enhanced from about 4.3T for x=0 to 10 T for x=0.05. The critical current density Jc of Mg(B0.95C0.05)2 is 1.05×104A/cm2 at 20K and 1T.

Key words: microwave synthesis, MgB2 superconductor, carbon doping

中图分类号:  (Effects of material synthesis, crystal structure, and chemical composition)

  • 74.62.Bf
74.10.+v (Occurrence, potential candidates) 74.25.Op (Mixed states, critical fields, and surface sheaths) 74.25.Sv (Critical currents) 74.70.Ad (Metals; alloys and binary compounds) 81.20.-n (Methods of materials synthesis and materials processing)