Phthalocyanine doping to improve critical current densities in MgB2 tapes

被引：10

作者：

Zhang, Xianping ^{[1
]}

Ma, Yanwei ^{[1
]}

Wang, Dongliang ^{[1
]}

Gao, Zhaoshun ^{[1
]}

Wang, Lei ^{[1
]}

Qi, Yanpeng ^{[1
]}

Awaji, Satoshi ^{[2
]}

Watanabe, Kazuo ^{[2
]}

Mossang, Eric ^{[3
]}

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, Grenoble High Magnet Field Lab, F-38042 Grenoble, France

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 2009年 / 22卷 / 04期

基金：

美国国家科学基金会;

关键词：

STEARIC-ACID; CARBON; POWDER; FIELDS; WIRES;

D O I：

10.1088/0953-2048/22/4/045019

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Phthalocyanine-doped MgB2 tapes were prepared by the in situ powder-in-tube method. The relationships between the critical current properties, crystallinity and microstructure were studied as a function of the phthalocyanine doping level. It is found that both H-irr and H-c2 were improved when MgB2 samples were doped with phthalocyanine, which are mainly attributed to the effective carbon substitution and enhanced flux pinning strength caused by very fine grain sizes. Furthermore, compared to pure samples, the MgO content remained almost unchanged in all doped tapes, which is very beneficial to having better grain connectivity in MgB2. Significantly improved J(c) was obtained in the phthalocyanine-doped MgB2 tapes, especially under high magnetic fields.

引用

页数：4

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