Doping with a special carbohydrate, C9H11NO, to improve the Jc-B properties of MgB2 tapes

被引：24

作者：

Zhang, Xianping ^{[1
]}

Wang, Dongliang ^{[1
]}

Gao, Zhaoshun ^{[1
]}

Wang, Lei ^{[1
]}

Qi, Yanpeng ^{[1
]}

Zhang, Zhiyu ^{[1
]}

Ma, Yanwei ^{[1
]}

Awaji, Satoshi ^{[2
]}

Nishijima, Gen ^{[2
]}

Watanabe, Kazuo ^{[2
]}

Mossang, Eric ^{[3
]}

Chaud, Xavier ^{[4
]}

机构：

[1] Chinese Acad Sci, Inst Elect Engn, Key Lab Appl Superconduct, Beijing 100190, Peoples R China

[2] Tohoku Univ, Inst Mat Res, High Field Lab Superconducting Mat, Sendai, Miyagi 9808577, Japan

[3] CNRS, Lab Natl Champs Magnet Intenses, F-38042 Grenoble 9, France

[4] CNRS, Consortium Rech Emergence Technol Avancees, F-38042 Grenoble 9, France

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2010年 / 23卷 / 02期

基金：

美国国家科学基金会;

关键词：

POWDER;

D O I：

10.1088/0953-2048/23/2/025024

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A significant improvement in J(c) at both 4.2 and 20 K has been achieved for MgB2 tapes using C9H11NO as a dopant. It is found that C9H11NO doping will cause a small depression in T-c while the J(c) and H-c2 values are strongly enhanced. The highest J(c) was obtained for a C9H11NO doped sample sintered at 800 degrees C, namely 3.7 x 10(4) A cm(-2), at 4.2 K, 10 T. This is the highest J(c) value obtained for a MgB2 tape using a carbohydrate as a doping material. Moreover, at 20 K, 5 T, a transport J(c) value as high as 1.9 x 10(4) A cm(-2) is observed, suggesting that MgB2 holds promise for practical applications. Besides the improvement of grain linkage, the clearly enhanced H-c2 is thought to be a major reason for the prominent J(c) performance, in a field, for C9H11NO doped MgB2 samples.

引用

页数：5

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