Levitation of a rare earth magnet above a YBCO high critical temperature superconductor via the Meissner effect. The superconductor discs were synthesized by Penn undergraduate students as part of the course MSE 250, Nanoscale Materials Laboratory. The discs are brought to the superconducting state by pouring liquid nitrogen over the material.
![](https://s2.save4k.ru/pic/7V9vVACvo8U/mqdefault.jpg)