The effects of sintering temperature on superconductivity in MgB2/Fe wires

被引：76
作者：
Kim, J. H.
Dou, S. X.
Wang, J. L.
Shi, D. Q.
Xu, X.
Hossain, M. S. A.
Yeoh, W. K.
Choi, S.
Kiyoshi, T.
机构：
[1] Univ Wollongong, Inst Superconduct & Electron Mat, Wollongong, NSW 2522, Australia
[2] Natl Inst Mat Sci, Supercond Mat Ctr, Magnet Dev Grp, Tsukuba, Ibaraki 3050003, Japan
来源：
SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 05期
关键词：
D O I：
10.1088/0953-2048/20/5/007
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We studied the effects of sintering temperature on the phase transformation, lattice parameters, full width at half-maximum (FWHM), strain, critical temperature (T-c), critical current density (J(c)) and resistivity (rho) inMgB(2)/Fe wires. All samples were fabricated by the in situ powder-in-tube method (PIT) and sintered within a temperature range of 650-900 degrees C. It was observed that wires sintered at low temperature, 650 degrees C, resulted in higher J(c) up to 12 T and lower T-c. The best transport J(c) value reached 4200 A cm(-2) at 4.2 K and 10 T. This is related to the grain boundary pinning due to small grain size. On the other hand, wires sintered at 900 degrees C had a lower J(c) in combination with a higher T-c.
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页码：448 / 451
页数：4
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