Systematic effects of carbon doping on the superconducting properties of Mg(B1-xCx)2 -: art. no. 217003

被引：329
作者：
Wilke, RHT [1 ]
Bud'ko, SL
Canfield, PC
Finnemore, DK
Suplinskas, RJ
Hannahs, ST
机构：
[1] Iowa State Univ, Ames Lab, Ames, IA 50011 USA
[2] Iowa State Univ, Dept Phys & Astron, Ames, IA 50011 USA
[3] Specialty Mat Inc, Lowell, MA 01851 USA
[4] Florida State Univ, Natl High Magnet Field Lab, Tallahassee, FL 32310 USA
来源：
PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 21期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1103/PhysRevLett.92.217003
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The upper critical field, H-c2, of Mg(B1-xCx)(2) has been measured in order to probe the maximum magnetic field range for superconductivity that can be attained by C doping. Carbon doped MgB2 filaments were prepared, and for carbon levels below 4% the transition temperatures are depressed by about 1 K/% C and H-c2(T=0) rises by about 5 T/% C. This means that 3.8% C substitution will depress T-c from 39.2 to 36.2 K and raise H-c2(T=0) from 16.0 to 32.5 T. These rises in H-c2 are accompanied by a rise in resistivity at 40 K from about 0.5 to about 10 muOmega cm.
引用
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页码：217003 / 1
页数：4
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