- #1
DariusP
- 50
- 3
I'm wondering if for example YBCO superconductor (which is considered type-II superconductor) that exhibits flux pinning effect is a bulk or some substrate with YBCO film on top of it?
I always thought that YBCO which exhibits flux pinning is a bulk in all of demonstration videos but it struck me when someone on youtube (he was not a scientist btw, so he could very well be wrong/uneducated in this field) said that only a substrate with a thin YBCO film can exhibit flux pinning and if it was an YBCO bulk then we would get Meissner effect (complete expulsion of magnetic field lines) and no pinning.
Got me confused. Anyone know how it is for sure?
I always thought that YBCO which exhibits flux pinning is a bulk in all of demonstration videos but it struck me when someone on youtube (he was not a scientist btw, so he could very well be wrong/uneducated in this field) said that only a substrate with a thin YBCO film can exhibit flux pinning and if it was an YBCO bulk then we would get Meissner effect (complete expulsion of magnetic field lines) and no pinning.
Got me confused. Anyone know how it is for sure?