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Effects of a liquid carbon dopant on the superconducting properties of MgB2

Published online by Cambridge University Press:  21 April 2011

Hyo Jin. Kim ,
Bong Kun. Lee ,
Chan Joong. Kim ,
Kyu Mann. Lee  and
Hai Woong. Park
Hyo Jin. Kim
Affiliation:
Dept. of Materials Engineering, Korea University of Technology and Education, 1800 Chungjeallo, Byeongcheon-Myeon, Cheonan-City, Chungnam Province, Korea Nuclear Nanomaterials Development Laboratory, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yuseong-gu, Daejeon 305-353, Korea
Bong Kun. Lee
Affiliation:
Dept. of Materials Engineering, Korea University of Technology and Education, 1800 Chungjeallo, Byeongcheon-Myeon, Cheonan-City, Chungnam Province, Korea
Chan Joong. Kim
Affiliation:
Nuclear Nanomaterials Development Laboratory, Korea Atomic Energy Research Institute, 150 Dukjin-dong, Yuseong-gu, Daejeon 305-353, Korea
Hai Woong. Park
Affiliation:
Dept. of Materials Engineering, Korea University of Technology and Education, 1800 Chungjeallo, Byeongcheon-Myeon, Cheonan-City, Chungnam Province, Korea
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Abstract

Various types of chemical doping have been reported as very effective methods to improve the superconducting properties of MgB2 superconductor. Specially, carbon doping via liquid type of carbon-containing compounds have been shown better superconducting properties. In this work, the liquid type of glycerin (C3H8O3) was used as a carbon dopant in MgB2 synthesis. The glycerin was mixed with a liquid media at a different ratio and then pretreated with refined boron powder. Then carbon doped MgB2 superconductor was synthesized through subsequent heat treatment of the pretreated boron powder with magnesium powder. Variation of the amount of carbon dopants and viscosity of the liquid media was correlated with critical current densities and other superconducting properties of MgB2 bulk. The effects of liquid carbon dopants on the superconducting properties also compared with those of solid dopants.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1254: Symposium L – Recent Advances and New Discoveries in High-Temperature Superconductivity , 2010 , 1254-L07-11
Copyright
Copyright © Materials Research Society 2010

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