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http://acervodigital.unesp.br/handle/11449/31225
- Title:
- Influence of ball-milled low purity boron powder on the superconductivity of MgB2
- Univ Wollongong
- HyperTech Res Inc
- Universidade Estadual Paulista (UNESP)
- 1051-8223
- MgB2 samples were prepared using as-supplied commercial 96% boron with strong crystalline phase and the same 96% boron (B) after ball milling. The effects of the properties of the starting B powder on the superconductivity were evaluated. We observed that samples using ball-milled 96% B, in comparison with the one made from the as-supplied 96% B, were character- ized by small grain size, broadened full width at half maximum (FWHM), and enhanced magnetic critical current density (J(c)). J(c) reached 2 x 10(3) Acm(-2) at 5 K and 8 T. The improved pinning of these samples seems to be caused by enhanced grain boundary pinning at high field.
- 1-Jun-2007
- IEEE Transactions on Applied Superconductivity. Piscataway: IEEE-Inst Electrical Electronics Engineers Inc., v. 17, n. 2, p. 2782-2785, 2007.
- 2782-2785
- Institute of Electrical and Electronics Engineers (IEEE)
- ball milling
- crystallinity
- magnetic critical current density
- MgB2
- http://dx.doi.org/10.1109/TASC.2007.899444
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/31225
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