DocumentCode
1076800
Title
Effect of Nano-C Doping on the Critical Current Density and Flux Pinning of MgB2 Tapes
Author
Zhang, Xianping ; Ma, Yanwei ; Gao, Zhaoshun ; Wang, Dongliang ; Awaji, Satoshi ; Nishijima, Gen ; Watanabe, Kazuo
Author_Institution
Chinese Acad. of Sci., Beijing
Volume
17
Issue
2
fYear
2007
fDate
6/1/2007 12:00:00 AM
Firstpage
2915
Lastpage
2918
Abstract
Nano-C doped Fe-sheathed MgB2 tapes with different doping levels were fabricated using a powder-in-tube method and an in situ reaction. The effects of nano-C doping on the transition critical temperature, microstructure, critical current density, and flux pinning of MgB2 tapes were studied. Compared to the un-doped tapes, critical current density Jc for all the C-doped samples with different doping level was enhanced by more than an order of magnitude in magnetic fields above 10 T. This result indicates that flux pinning was effectively enhanced by the nano-C doping. Highly dispersed nanoparticles and the substitutions of B by C are proposed to be responsible for the improvement of Jc -B properties.
Keywords
critical current density (superconductivity); flux pinning; magnesium compounds; magnetic fields; nanoparticles; superconducting tapes; type II superconductors; MgB2 tapes; MgB2:C; critical current density; doping levels; flux pinning; highly dispersed nanoparticles; magnetic fields; microstructure; nano-C doping; powder-in-tube method; transition critical temperature; Critical current density; Doping; Flux pinning; Magnetic fields; Microstructure; Nanoparticles; Superconducting films; Superconducting materials; Superconducting transition temperature; Wires; Critical current property; MgB$_{2}$
fLanguage
English
Journal_Title
Applied Superconductivity, IEEE Transactions on
Publisher
ieee
ISSN
1051-8223
Type
jour
DOI
10.1109/TASC.2007.899476
Filename
4278339
Link To Document