I Flux pinning effect and hysteresis loop

[Mayan Fung]

I am taking an experimental course which requires us to conduct experiments by ourselves. One of the tasks is to demonstrate the flux pinning effect of a type II superconductor YBCO by magnetic levitation. The professor asked me to discuss the effect by using the hysteresis loop (magnetization vs B-field) in the lab report.

I tried to search for information on Google but I cannot find articles discussing the relationships between them. I wonder in what direction I can discuss it in my lab report?

 

[Mayan Fung]

Oh, I think I got the answer. When the magnetic field is larger than the critical value, flux starts to penetrate the solid and the magnetization will drop. Thanks all!