Enhanced critical current densities in Cu-sheathed MgB2

被引：3
|
作者：
Strickland, NM
Buckley, RG
Otto, A
机构：
[1] Ind Res Ltd, Lower Hutt 6009, New Zealand
[2] Amer Supercond, Westborough, MA 01581 USA
来源：
CURRENT APPLIED PHYSICS | 2004年 / 4卷 / 06期
关键词：
MgB2; mechanical alloy; critical current; critical state; copper sheath;
D O I：
10.1016/j.cap.2004.06.002
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Micron-scale mixing of magnesium and boron powders by mechanical alloying allows the MgB2 formation reaction to proceed as low as 450 C, with high-quality material formed in an hour at 600 C. At these low reaction temperatures the reaction can be performed in situ in a copper sheath, and it is found that the presence of copper enhances the superconducting properties of the MgB2. Self-field critical current densities, calculated from full critical-state simulation of magnetization hysteresis, are up to 7 x 10(5) A/cm(2) at 13.6 K and 1 x 10(5) A/cm(2) at 30 K. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：688 / 692
页数：5
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