Microstructures and superconducting properties in Ti-doped MgB2/Ta/Cu tape

被引：9
作者：
Fu, BQ
Feng, Y
Zhao, Y
Pradhan, AK
Cheng, CH
Ji, P
Liu, XH
Liu, CF
Yan, G
Zhou, L
机构：
[1] NW Inst Nonferrous Met Res, Xian 710016, Shannxi, Peoples R China
[2] Univ Virginia, Jesse W Beams Lab, Charlottesville, VA 22901 USA
[3] Univ New S Wales, Sch Mat Sci & Engn, Superconduct Res Grp, Sydney, NSW 2052, Australia
来源：
PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS | 2003年 / 386卷
关键词：
MgB2; doping; critical current density;
D O I：
10.1016/S0921-4534(02)02188-3
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We fabricated MgB2/Ta/Cu tapes with and without Ti-doping through the in situ powder-in-tube method and studied the phase composition, microstructure and superconducting properties by XRD, SEM and SQUID magnetometer. The results show that the,critical temperature of Ti-doped MgB2/Ta/Cu tape is around 38 K. The high magnetic critical current density of 1.51.x 10(6) A/cm(2) (10 K, self-field) and 9.3 x 10(5) A/cm(2) (20 K, self-field) were obtained in this sample, which is much higher than MgB2/Ta/Cu tapes without Ti-doping. The microstructure observations indicate that the grain size of MgB2 is much reduced by Ti-doping and the density of Ti-doped tape is higher, which may enhance J(c) of MgB2 tapes. (C) 2002 Elsevier Science B.V. All rights reserved.
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收藏
页码：659 / 662
页数：4
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