Comparison between nano-diamond and carbon nanotube doping effects on critical current density and flux pinning in MgB2

被引：49

作者：

Cheng, C. H.

Yang, Y.

Munroe, P.

Zhao, Y.

机构：

[1] SW Jiaotong Univ, Key Lab Adv Technol Mat, Minist Educ China, Superconduct R&D Ctr, Chengdu 610031, Sichuan, Peoples R China

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

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2007年 / 20卷 / 03期

关键词：

D O I：

10.1088/0953-2048/20/3/032

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Doping effects of nano-diamond and carbon nanotubes (CNTs) on critical current density of bulk MgB2 have been studied. CNTs are found prone to be doped into the MgB2 lattice whereas nano-diamond tends to form second- phase inclusions in the MgB2 matrix, leading to a more significant improvement of J(c)( H) by doping by nano-diamond than by CNTs in MgB2. TEM reveals tightly packed MgB2 nanograins (50 - 100 nm) with a dense distribution of diamond nanoparticles (10 - 20 nm) inside MgB2 grains in nano-diamond-doped samples. Such a unique microstructure leads to a flux pinning behaviour different from that in CNTs-doped MgB2.

引用

页码：296 / 301

页数：6

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