| Bi1.8Pb0.4Sr2Ca2.2Cu3Oy的磁通运动与临界电流特征 |
| |
| 引用本文： | 曾朝阳,史可信,余正,丁世英,周贻茹,叶兵.Bi1.8Pb0.4Sr2Ca2.2Cu3Oy的磁通运动与临界电流特征[J].物理学报,1993,42(7):1160-1166. |
| |
| 作者姓名： | 曾朝阳 史可信 余正 丁世英 周贻茹 叶兵 |
| |
| 作者单位： | (1)北京有色金属研究总院,北京100088; (2)南京大学物理系固体微结构物理国家重点实验室,南京210008 |
| |
| 基金项目： | 国家超导技术联合研究开发中心资助的课题 |
| |
| 摘 要： | 制备了银包套的Bi1.8Pb0.4Sr2Ca2.2Cu3Oy带材。微结构观察证明样品是高度织构化的Bi2223单相。输运测量发现Jc(T,B,θ,φ)和R(T,B,θ,φ)均与θ有关,与φ无关(T=77K,B<1T),式中的θ和φ分别表示磁场与ab面和电流的夹角。求得了磁通运动的激活能。提出了热激活磁通弯结的形成与运动模型,并用London理论计算了弯结
关键词：
|
| 关 键 词： | 超导体 铋系 磁通钉扎 临界电流 |
| 收稿时间： | 9/3/1992 12:00:00 AM |
FLUX MOTION AND CRITICAL CURRENT CHARACTERISTICS OF Ag-SHEATHED Bi1.8Pb0.4Sr2Ca2.2Cu3Oy TAPES |
| |
| ZENG ZHAO-YANG,SHI KE-XIN,YU ZHENG,DING SHI-YING,ZHOU YI-RU and YE BING.FLUX MOTION AND CRITICAL CURRENT CHARACTERISTICS OF Ag-SHEATHED Bi1.8Pb0.4Sr2Ca2.2Cu3Oy TAPES[J].Acta Physica Sinica,1993,42(7):1160-1166. |
| |
| Authors: | ZENG ZHAO-YANG SHI KE-XIN YU ZHENG DING SHI-YING ZHOU YI-RU and YE BING |
| |
| Abstract: | Ag-sheathed Bi1.8Pb0.4Sr2Ca2.2Cu3Oy superconducting tapes were prepared. Microstruc-ture examination shows that it were made of highly textured Bi2223 single phase. Measurements of transport properties in liquid nitrogen and field lower than 1T reveal that Jc(T,B,θ, φ) and R(T,B,θ,φ) of this material are θ dependent and φ independent, where θ is the angle between magnetic field and ab plane and φ is the angle between magnetic field and transport current. Activation energy of flux lines was gained. The Arrhenius relation of R(T,B) was observed and activation energy of flux motion was determined. The transport characteristics and the activation energy are explained as the thermally activated flux line diffusive motion over intrinsic flux pinning barrier by means of nucleation of two-dimensional pancake vortex pairs. |
| |
| Keywords: | |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《物理学报》浏览原始摘要信息 |
| 点击此处可从《物理学报》下载免费的PDF全文 |
|
