HIGH-PRESSURE SYNTHESIS OF MgB2 SUPER-CONDUCTOR WITH Tc ABOVE 39 K

doi:10.1088/1009-1963/10/4/315

中国物理B ›› 2001, Vol. 10 ›› Issue (4): 338-339.doi: 10.1088/1009-1963/10/4/315

HIGH-PRESSURE SYNTHESIS OF MgB₂ SUPER-CONDUCTOR WITH T_c ABOVE 39 K

李绍春, 朱嘉林, 禹日成, 李凤英, 刘振兴, 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

收稿日期:2001-02-21 出版日期:2001-04-15 发布日期:2005-07-11
基金资助:
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.

HIGH-PRESSURE SYNTHESIS OF MgB₂ SUPER-CONDUCTOR WITH T_c 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

Received:2001-02-21 Online:2001-04-15 Published:2005-07-11
Supported by:
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.

摘要/Abstract

摘要： 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.

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.

Key words: MgB₂, high-pressure synthesis, superconductivity

中图分类号: (Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)

81.20.Ev

74.70.Ad (Metals; alloys and binary compounds) 74.10.+v (Occurrence, potential candidates)

李绍春, 朱嘉林, 禹日成, 李凤英, 刘振兴, 靳常青. HIGH-PRESSURE SYNTHESIS OF MgB₂ SUPER-CONDUCTOR WITH T_c ABOVE 39 K[J]. 中国物理B, 2001, 10(4): 338-339.

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 T_c ABOVE 39 K[J]. Chinese Physics, 2001, 10(4): 338-339.

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HIGH-PRESSURE SYNTHESIS OF MgB₂ SUPER-CONDUCTOR WITH T_c ABOVE 39 K

HIGH-PRESSURE SYNTHESIS OF MgB₂ SUPER-CONDUCTOR WITH T_c ABOVE 39 K

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