HIGH-PRESSURE SYNTHESIS OF MgB2 SUPER-CONDUCTOR WITH Tc ABOVE 39 K
Li Shao-chun (李绍春), Zhu Jia-lin (朱嘉林), Yu Ri-cheng (禹日成), Li Feng-ying (李凤英), Liu Zhen-xing (刘振兴), Jin Chang-qing (靳常青)
Laboratory for Extreme Condition Physics, Institute of Physics, Center for Condensed Matter Physics, and Beijing Center for High Pressure Research, Chinese Academy of Sciences, Beijing 100080, China
Abstract We report on the high-pressure synthesis and superconductivity of MgB2 intermetallic compounds. The compounds have been obtained through high-pressure sintering of the mixtures of magnesium and boron fine powders under 5.0 GPa and at ~1000℃ for 30 min. Magnetic measurements using a SQUID magnetometer show the sharp bulk superconducting transition above 39 K; the four-probe dc resistivity measurements indicate the highly-conductive normal state and sharp superconducting transition. The results highlight that high-pressure synthesis would be a promising way to promote the studies of this new kind of intermetallic superconductors.
Received: 21 February 2001
Accepted manuscript online:
PACS:
81.20.Ev
(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)
Fund: Project supported by the Outstanding Youth Fund of National Natural Science Foundation of China (Grant No.59725105), and "Hundreds of Talents" Program of the Chinese Academy of Sciences.
Cite this article:
Li Shao-chun (李绍春), Zhu Jia-lin (朱嘉林), Yu Ri-cheng (禹日成), Li Feng-ying (李凤英), Liu Zhen-xing (刘振兴), Jin Chang-qing (靳常青) HIGH-PRESSURE SYNTHESIS OF MgB2 SUPER-CONDUCTOR WITH Tc ABOVE 39 K 2001 Chinese Physics 10 338
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