High critical current density and improved irreversibility field in bulk MgB2 made by a scaleable, nanoparticle addition route

被引：201

作者：

Wang, J

Bugoslavsky, Y

Berenov, A

Cowey, L

Caplin, AD

Cohen, LF

Driscoll, JLM

Cooley, LD

Song, X

Larbalestier, DC

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Ctr High Temp Superconduct, London SW7 2AZ, England

[2] Univ Wisconsin, Ctr Appl Superconduct, Madison, WI 53706 USA

来源：

APPLIED PHYSICS LETTERS | 2002年 / 81卷 / 11期

关键词：

D O I：

10.1063/1.1506184

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bulk samples of MgB2 were prepared with 5, 10, and 15 wt % Y2O3 nanoparticles, added using a simple solid-state reaction route. Transmission electron microscopy showed a fine nanostructure consisting of similar to3-5 nm YB4 nanoparticles embedded within MgB2 grains of similar to400 nm size. Compared to an undoped control sample, an improvement in the in-field critical current density J(C) was observed, most notably for 10% doping. At 4.2 K, the lower bound J(C) value was similar to2x10(5) A cm(-2) at 2 T. At 20 K, the corresponding value was similar to8x10(4) A cm(-2). Irreversibility fields were 11.5 T at 4.2 K and 5.5 T at 20 K. (C) 2002 American Institute of Physics.

引用

页码：2026 / 2028

页数：3

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