Magnetic relaxation and lower critical field in MgB2 wires

被引：3
|
作者：
Feng, Y. [1 ]
Yan, G. [1 ]
Zhao, Y. [2 ]
Pradhan, A.K. [3 ]
Liu, C.F. [1 ]
Zhang, P.X. [1 ]
Zhou, L. [1 ]
机构：
[1] Northwest Inst Nonferrous Metal Res, PO Box 51, Xi'an 710016, China
[2] School of Materials Sci. and Eng., University of New South Wales, Sydney, NSW 2052, Australia
[3] Jesse W Beams Laboratory, University of Virginia, Charlottesville, VA 22901, United States
来源：
| 2003年 / Institute of Physics Publishing卷 / 15期
关键词：
Critical current density (superconductivity) - High temperature superconductors - Magnetic relaxation - Superconducting transition temperature;
D O I：
10.1088/0953-8984/15/37/007
中图分类号：
学科分类号：
摘要：
Magnetic relaxation behaviour, critical current density Jc and lower critical field Hc1 have been investigated in MgB2/Ta/Cu wires. It is found that Jc and Hc1 decrease linearly with temperature in the whole temperature region below Tc. The relaxation rate is very small and has a weak temperature dependence compared to high-Tc superconductors. Also, the pinning potential is much larger and the temperature and field dependences of the pinning potential are briefly discussed.
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