Partial levitation, type-II-superconductor characteristic, at room temperature and atmospheric pressure in PCPOSOS

We synthesized materials, Pb_10-xCu_x(P(O_1-yS_y)₄)₆O_1-zS_z (PCPOSOS), called PCPOSOS, which exhibit superconducting behavior at room temperature and atmospheric pressure. These materials displayed characteristics of a superconductor, including zero resistance, the Meissner effect, and partial levitation when placed on a magnet (arXiv: 2307.12037). The partial levitation is caused by an inhomogeneity in the magnetic field of the magnet and occurred within the range of critical magnetic fields, H_c1 and H_c2. That is, the magnetic field of the magnet increased with going from center to the edge of magnet. The magnet had approximately 2000G at the center and approximately 3,000G at its edge. The levitation occurred near center. This indicates the center of the magnet is close to H_c1. It disappeared between center and the edge near H_c2, with H_c1 being much smaller than H_c2, because the magnetic moment at H_c2 is much smaller than that at H_c1. When the magnet is slightly moved, the levitation returns to its original position. This phenomenon is analyzed as flux pinning, which is typical of a type-II superconductor. Moreover, the quantum-locking phenomenon, characteristic of a Type-I superconductor, may appear. However, we interpret PCPOSOS as a Type-II superconductor. We will show two videos of levitations and two videos of magnets.