中国物理B ›› 2008, Vol. 17 ›› Issue (3): 1124-1129.doi: 10.1088/1674-1056/17/3/062
郭娟, 董成, 高红, 闻海虎, 杨立红, 曾富, 陈红
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)
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.
中图分类号: (Effects of material synthesis, crystal structure, and chemical composition)