Improved critical current properties observed in MgB2 bulks synthesized by low-temperature solid-state reaction

被引：125

作者：

Yamamoto, A

Shimoyama, J

Ueda, S

Katsura, Y

Horii, S

Kishio, K

机构：

[1] Univ Tokyo, Dept Superconduct, Bunkyo Ku, Tokyo 1138656, Japan

[2] Univ Tokyo, Dept Supercond, Bunkyo Ku, Tokyo 1138656, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2005年 / 18卷 / 01期

关键词：

D O I：

10.1088/0953-2048/18/1/019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

MgB2 bulks were synthesized by the solid-state reaction of Mg and B at 600 degreesC and their superconducting properties were compared with samples heated at 850 degreesC. The samples heated at 600 degreesC exhibited improved critical current properties up to high fields at 20 K. Poor crystallinity is found to contribute enhancement of H-c2, H-irr and J(c) at high fields. On the other hand, the strongly grain connected network structure and smaller grain size are responsible for high J(c) at low fields. Improved J(c) up to 3.93 x 10(5) A cm(-2) and a high mu(0)H(irr) of similar to4.7 T, as for undoped MgB2 bulks, guarantees that low-temperature sintering is a promising way to fabricate MgB2 conductors with high critical current performance.

引用

页码：116 / 121

页数：6

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