Pinning Potential and Critical Current Densities in Powder Melting Processed Y(Ho)BCO Samples
LIU Peng1,2, LI Jingwei1, YIN Bo1, GUO Shuquan1, ZHAO Zhongxian1, FENG Yong3, ZHOU Lian3
1National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080
2Department of Physics, Shanxi Normal University, Xian 710062
3Northwestern Institute for Non-ferrous Metal Research, Baoji 721014
Pinning Potential and Critical Current Densities in Powder Melting Processed Y(Ho)BCO Samples
LIU Peng1,2;LI Jingwei1;YIN Bo1;GUO Shuquan1;ZHAO Zhongxian1;FENG Yong3;ZHOU Lian3
1National Laboratory for Superconductivity, Institute of Physics, Academia Sinica, Beijing 100080
2Department of Physics, Shanxi Normal University, Xian 710062
3Northwestern Institute for Non-ferrous Metal Research, Baoji 721014
Abstract： Magnetic relaxation and magnetization of the powder melting Y1-xHoxBa2Cu3O7 (x =0.2, 0.4 and 0.6) samples have been measured at the temperature of 70K. The pinning potential U and magnetization critical current density Jc have been obtained according to the Anderson-Kim model and Bean model. It is found that both U and Jc were influenced by doping Ho. In the sample with x = 0.4 the pinning potential U has a Value of 3.2eV when the field is equal to 1 kG and parallel to c-axis, which is the highest one we have known in the high Tc superconductors.
1993, Vol. 10 
