Document Detail


Enhancement in the critical current density of C-doped MgB2 wire using a polyacrylic acid dopant.
MedLine Citation:
PMID:  22629967     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
C-doped MgB2 wires were fabricated from a polyacrylic acid (PAA) using a conventional in-situ PIT technique. The effects of the PAA content on the lattice parameter, microstructure, critical temperature (Tc) and critical current density (Jc) were examined. With increasing PAA content, the amount of MgO in the sample increased but the crystallinity, a-axis lattice parameter, and Tc of MgB2 wires decreased, indicating that the C that decomposed from PAA during heat treatment had substituted for B. All doped samples exhibited a higher Jc than the undoped sample at high magnetic field, and the Jc(B) property improved with increasing PAA content: for the 7 wt% doped sample, the Jc was approximately 3-times higher than that of the pristine sample (1.28 kA/cm2 vs. 3.43 kA/cm2) at 5 K and 6.6 T. The improved Jc(B) of the doped sample was attributed to the decreased grain size, enlarged lattice distortion and increased C doping level.
Authors:
Seung Muk Lee; Soo Min Hwang; Chang Min Lee; Won Kim; Jinho Joo; Jun Hyung Lim; Chan-Joong Kim; Gye-Won Hong
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of nanoscience and nanotechnology     Volume:  12     ISSN:  1533-4880     ISO Abbreviation:  J Nanosci Nanotechnol     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-05-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101088195     Medline TA:  J Nanosci Nanotechnol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1406-10     Citation Subset:  IM    
Affiliation:
School of Advanced Materials Science and Engineering, Sungkyunkwan University, Suwon 440-746, Korea.
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