Critical current in tetragonal superconductor CaLaBaCu3Oy
摘要:
Tetragonal CaLaBaCu3Oy (CLBCO) samples with several differnt oxygen contents were prepared by-changing the annealing temperature or annealing time in O-2. Oxygen-rich samples showed normal transport properties with homogeneous oxygen content. On the other hand, rather oxygen-less samples with inhomogeneous concentration showed unusually reentrant superconductivity like "magnetic superconductors".