Finding materials exhibiting superconductivity at room temperature has long been one of the ultimate goals in physics and material science. Recently, room-temperature superconducting properties have been claimed in a copper substituted lead phosphate apatite (Pb10−xCux(PO4)6O, or called LK-99) [1-3]. Using a similar approach, we have prepared LK-99 like samples and confirmed the half-levitation behaviors in some small specimens under the influence of a magnet at room temperature. To examine the magnetic properties of our samples, we have performed systematic magnetization measurements on the as-grown LK-99-like samples, including the half-levitated and non-levitated samples. The magnetization measurements show the coexistence of soft-ferromagnetic and diamagnetic signals in both half-levitated and non-levitated samples. The electrical transport measurements on the as-grown LK-99-like samples including both half-levitated and non-levitated samples show an insulating behavior characterized by the increasing resistivity with the decreasing temperature.
@article{arxiv.2308.11768,
title = {Ferromagnetic and insulating behavior in both half magnetic levitation and non-levitation LK-99 like samples},
author = {Pinyuan Wang and Xiaoqi Liu and Jun Ge and Chengcheng Ji and Haoran Ji and Yanzhao Liu and Yiwen Ai and Gaoxing Ma and Shichao Qi and Jian Wang},
journal= {arXiv preprint arXiv:2308.11768},
year = {2023}
}