DocumentCode
974957
Title
Properties of 
Superconductor by Doping Impurity of SiC, Graphite, 
, and C Nano-Tube
Author
Agatsuma, K. ; Furuse, M. ; Umeda, M. ; Fuchino, S. ; Lee, W.J. ; Hur, J.M.
Author_Institution
Nat. Inst. of Adv. Ind. Sci. & Technol., Ibaraki
Volume
16
Issue
2
fYear
2006
fDate
6/1/2006 12:00:00 AM
Firstpage
1407
Lastpage
1410
Abstract
Since MgB2 superconductor was discovered by Akimitsu, many scientists has been studied this new intermediate temperature superconductor material. Recently Dou reported the critical current density and flux pinning of MgB2 is enhanced by doping of SiC nano powder, and Fujii reported MgB2 superconductor made by the powder-in-tube in-situ process using MgH2 as a precursor powder enhanced the critical current density especially under high magnetic field. Also Matsumoto reported the irreversibility field of MgB 2 tape prepared by the in-situ powder in tube process using MgH2 as a precursor powder increased to 23 T by the SiC doping. These results show MgB2 has high potential as a strong candidate for a practical use. We study the effects of doping nano carbon impurity because graphite has the same structure as the hexagonal Boron structure in MgB2. We added carbon impurities of graphite, C60, and open-ended carbon nano tube respectively to MgB2 conductors made by powder in tube ex-situ process
Keywords
carbon nanotubes; critical current density (superconductivity); flux pinning; fullerenes; graphite; impurities; magnesium compounds; silicon compounds; superconducting tapes; MgB2:C; MgB2:C60; MgB2:SiC; critical current density; doping impurity; flux pinning; hexagonal boron structure; high magnetic field; intermediate temperature superconductor material; nano carbon impurity effect; superconductor tape; Critical current density; Doping; Flux pinning; Impurities; Magnetic fields; Powders; Silicon carbide; Superconducting films; Superconducting materials; Temperature; critical current; flux pinning; impurity doping; powder metallurgy;
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2005.864290
Filename
1643116
Link To Document