Effects of nano-ZrO2 particles on the superconductivity of Pb-doped BSCCO

被引:98
作者
Jia, ZY [1 ]
Tang, H [1 ]
Yang, ZQ [1 ]
Xing, YT [1 ]
Wang, YZ [1 ]
Qiao, GW [1 ]
机构
[1] Acad Sinica, Inst Met Res, Shenyang 110015, Peoples R China
来源
PHYSICA C | 2000年 / 337卷 / 1-4期
关键词
nano-ZrO particles; superconductivity; Pb-doped BSCCO;
D O I
10.1016/S0921-4534(00)00072-1
中图分类号
O59 [应用物理学];
学科分类号
摘要
The major limitations of Bi-system superconductor application are the intergrain weak links and weak flux pinning capability. In order to promote the practical application of Bi-system superconductor, effective flux pinning centers must be artificially introduced into HTS to enhance the flux pinning capability. With those goals, we have investigated the effects of nanometer-sized ZrO2 addition on flux pinning capability of the bulk Pb-doped Bi-2223 by using of X-ray diffraction (XRD), DC resistivity, rho, AC susceptibility, c, and magnetic hysteresis loops measurements. We have prepared samples by Bi,Bi1.8Pb0.4Sr2Ca2.2Cu3O10+y (nano-ZrO2)(x) with x range from 0 to 0.5. The results show that, with the increasing of x-, the T-c (onset) drops down gradually. However, the measurements of the critical current density, J(c), show that appropriate amount-doped nano-ZrO2 greatly enhance the values of J(c) under magnetic fields. According to the results of XRD patterns, there are slight reflection peaks of ZrO2-related nonsuperconducting compounds. It is believed that these nonsuperconducting ZrO2-related compounds act as effective flux pinning centers. (C) 2000 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:130 / 132
页数:3
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