2 research outputs found
Fish-tail Effect and Irreversibility Field of (Cu,C)BaCaCuO-(LiF) superconductor
Addition of (LiF), and of proper amount of (AgO) as
oxidizing agent, to (Cu,C)BaCaCuO superconductor is
useful to control and shift the doping characteristics (hole density and
distribution, and level of disorder) into the region where the irreversible
properties, i.e. fish-tail effect (FTE) and irreversibility field H,
are improved. Among notable effects are the development of the second
magnetization peak with a higher amplitude J, max and the enhancement of
H at high temperatures, above a certain value T* which depends on both
y and z. The best results are obtained for the sample with
y=0.1 and z=0.73. This sample preserves its single phase
Cu,C-1234 composition. The influence on the FTE and H of the interplay
between doping characteristics, controlled by LiF and AgO content, is
discussed.Comment: 28 pages, accepted to J. Supercon