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)
National Laboratory for Superconductivity, Institute of Physics, Chinese Academy of Sciences,Beijing & National Laboratory for Condensed Matter Physics, Beijing 100080, China
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.
Received: 26 March 2007
Revised: 11 October 2007
Accepted manuscript online:
PACS:
74.62.Bf
(Effects of material synthesis, crystal structure, and chemical composition)
(Methods of materials synthesis and materials processing)
Fund: 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).
Cite this article:
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) Rapid preparation of Mg(B1-xCx)2 superconductor using hybrid microwave method 2008 Chin. Phys. B 17 1124
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