Magnetic relaxation and lower critical field in MgB2 wires

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Abstract
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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Author(s)
Feng, Y
Yan, G
Zhao, Yong
Pradhan, A
Liu, C
Zhang, P
Zhou, L
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Publication Year
2003
Resource Type
Journal Article
Degree Type
UNSW Faculty