Doping effect of nano-diamond on superconductivity and flux pinning in MgB2

被引：69

作者：

Cheng, CH ^{[1
]}

Zhang, H

Zhao, Y

Feng, Y

Rui, XF

Munroe, P

Zeng, HM

Koshizuka, N

Murakami, M

机构：

[1] Univ New S Wales, Sch Mat Sci & Engn, Sydney, NSW 2052, Australia

[2] Peking Univ, Dept Phys, State Key Lab Mesophys, Beijing 100871, Peoples R China

[3] SW Jiaotong Univ, Supercond R&D Ctr, Sichuan 610031, Peoples R China

[4] NW Inst Nonferrous Met Res, Shaanxi 710016, Peoples R China

[5] Zhongshan Univ, Minist Educ, Key Lab Polymer Composites & Funct Mat, Guangzhou 510275, Peoples R China

[6] ISTEC, Supercond Res Lab, Koto Ku, Tokyo 1350062, Japan

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2003年 / 16卷 / 10期

关键词：

D O I：

10.1088/0953-2048/16/10/310

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The doping effect of diamond nanoparticles on the superconducting properties of MgB2 bulk material has been studied. It is found that the superconducting transition temperature T-c of MgB2 is suppressed by the diamond doping, however, the irreversibility field H-irr and the critical current density J(c) are systematically enhanced. Microstructural analysis shows that the diamond-doped MgB2 superconductor consists of tightly-packed MgB2 nano-grains (similar to50-100 nm) with highly dispersed and uniformly distributed diamond nanoparticles (similar to10-20 nm) inside the grains. The high density of dislocations and diamond nanoparticles may be responsible for the enhanced flux pinning in the diamond-doped MgB2.

引用

页码：1182 / 1186

页数：5

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