Issue Information :
روزنامه با شماره پیاپی سال 2013
Pages :
5
From page :
1
To page :
5
Abstract :
The field dependence of the resistivity and the critical current density, Jc(B), of MgB2 doped with 10 wt% wet and dry succinic acid have been investigated by magnetic measurements. The dry succinic acid significantly enhanced the upper critical field, the irreversibility field, and the Jc(B) compared to the wet succinic acid doped MgB2 and the pure MgB2. The field dependence of Jc(B) was analyzed within the collective pinning model. The observed temperature dependence of the crossover field, Bsb(T), from the single vortex to the small vortex bundle pinning regime shows that flux pinning arising from variation in the critical temperature, δTc, is the dominant mechanism for the wet sample over the whole studied temperature range, while there is a competition between δTc pinning and the pinning from variation in the mean free path, δl, for the dry sample.
Journal title :
Acta Tropica
Serial Year :
2013
Journal title :
Acta Tropica
Record number :
1751313
Link To Document :
بازگشت