Enhancement of critical current density in MgB2 bulk superconductor by Ti doping

被引：17

作者：

Zhao, Y

Feng, Y

Machi, T

Cheng, CH

Huang, DX

Fudamoto, Y

Koshizuka, N

Murakami, M

机构：

[1] Int Supercond Technol Ctr, Supercond Res Lab, Koto Ku, Tokyo 135, Japan

[2] Univ New S Wales, Superconduct Res Grp, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

来源：

EUROPHYSICS LETTERS | 2002年 / 57卷 / 03期

关键词：

D O I：

10.1209/epl/i2002-00479-1

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We studied the Ti doping effect on the superconducting properties and microstructure of sintered MgB2 bulk polycrystals. Using Ti as a sintering assistant, we have fabricated MgB2 bulk materials consisting of ne 10 nm scale particles and achieved a high J(c) of 1 MA/cm(2) in self-field and 3 x 10(5) A/cm(2) in 1 T at 20 K. The large enhancement of J(c) is explained by the excellent connection between grains and the high density of pinning centers served by both grain boundaries and MgO nanoparticles.

引用

页码：437 / 443

页数：7

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