Increased flux pinning in both pure and carbon-nanotube-embedded Bi-2212 superconductors

被引：8
|
作者：
Huang, SL
Koblischka, MR
Fossheim, K
Ebbesen, TW
Johansen, TH
机构：
[1] UNIV STRASBOURG 1,ISIS,F-67000 STRASBOURG,FRANCE
[2] NEC RES INST,PRINCETON,NJ 08540
[3] UNIV OSLO,DEPT PHYS,N-0316 OSLO,NORWAY
来源：
PHYSICA C | 1997年 / 282卷
关键词：
D O I：
10.1016/S0921-4534(97)01231-8
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this work, we have prepared both Bi2Sr2CaCu2O8+delta samples (Bi-2212) and Bi2Sr2CaCu2O8+delta samples with carbon nanotubes embedded (CNTE Bi-2212) by partial-melting processing. AC susceptibilty measurements show that the Bi-2212 samples as well as the CNTE Bi-2212 samples have a sharp transition at 94K and -86K, respectively. The pinning properties of these samples are studied by means of magneto-optical visualization of flux distribution up to 77K. The results indicate that our Bi-2212 samples have obviously enhanced pinning capacity, and in our CNTE Bi-2212 samples, the pinning is even stronger and the fields of flux entry are doubled at intermediate temperatures compared to those of our Bi-2212 samples.
引用
收藏
页码：2279 / 2280
页数：2
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