TY - JOUR
T1 - Phthalocyanine doping to improve critical current densities in MgB 2 tapes
AU - Zhang, Xianping
AU - Ma, Yanwei
AU - Wang, Dongliang
AU - Gao, Zhaoshun
AU - Wang, Lei
AU - Qi, Yanpeng
AU - Awaji, Satoshi
AU - Watanabe, Kazuo
AU - Mossang, Eric
PY - 2009/7/24
Y1 - 2009/7/24
N2 - Phthalocyanine-doped MgB2 tapes were prepared by the insitu powder-in-tube method. The relationships between the critical current properties, crystallinity and microstructure were studied as a function of the phthalocyanine doping level. It is found that both Hirr and H c2 were improved when MgB2 samples were doped with phthalocyanine, which are mainly attributed to the effective carbon substitution and enhanced flux pinning strength caused by very fine grain sizes. Furthermore, compared to pure samples, the MgO content remained almost unchanged in all doped tapes, which is very beneficial to having better grain connectivity in MgB2. Significantly improved Jc was obtained in the phthalocyanine-doped MgB2 tapes, especially under high magnetic fields.
AB - Phthalocyanine-doped MgB2 tapes were prepared by the insitu powder-in-tube method. The relationships between the critical current properties, crystallinity and microstructure were studied as a function of the phthalocyanine doping level. It is found that both Hirr and H c2 were improved when MgB2 samples were doped with phthalocyanine, which are mainly attributed to the effective carbon substitution and enhanced flux pinning strength caused by very fine grain sizes. Furthermore, compared to pure samples, the MgO content remained almost unchanged in all doped tapes, which is very beneficial to having better grain connectivity in MgB2. Significantly improved Jc was obtained in the phthalocyanine-doped MgB2 tapes, especially under high magnetic fields.
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U2 - 10.1088/0953-2048/22/4/045019
DO - 10.1088/0953-2048/22/4/045019
M3 - Article
AN - SCOPUS:67650739247
VL - 22
JO - Superconductor Science and Technology
JF - Superconductor Science and Technology
SN - 0953-2048
IS - 4
M1 - 045019
ER -