Magnetic Properties of Partial Melt (Tl0.5Pb0.5) (BaxSr0.8)2Ca2Cu3Oy(x = 0.1,0.2) Superconductors
QIN Mengjun, CAI Dianxian, JIN Xin, YAO Xixian, PENG Huotian, PENG Qiuyun, ZHOU Sihai
Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
Changsha Research Institute of Mining and Metallurgy, Changsha 410012
Magnetic Properties of Partial Melt (Tl0.5Pb0.5) (BaxSr0.8)2Ca2Cu3Oy(x = 0.1,0.2) Superconductors
Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093
Changsha Research Institute of Mining and Metallurgy, Changsha 410012
Abstract： Magnetic measurements have been carried out on partial melt (Tl0.5Pb0.5)(BaxSr0.8)2Ca2Cu3Oy(x= 0.1,0.2) (TI-1223) samples, which indicate that higher melting temperature and longer melting time can be used to obtain Tl-1223 compound with better superconducting properties. On the contrary, introducing of Ba vacancy into Tl-1223 samples results in worse superconducting properties. At the end, the power law relationship between the critical current density and the applied field is explained by the flux creep model and the collective pinning theory.
1995, Vol. 12 
