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Finding materials exhibiting superconductivity at room temperature has longbeen one of the ultimate goals in physics and material science. Recently,room-temperature superconducting properties have been claimed in a coppersubstituted lead phosphate apatite (Pb$_{10-x}$Cu$_x$(PO$_4$)$_6$O, or calledLK-99) [1-3]. Using a similar approach, we have prepared LK-99 like samples andconfirmed the half-levitation behaviors in some small specimens under theinfluence of a magnet at room temperature. To examine the magnetic propertiesof our samples, we have performed systematic magnetization measurements on theas-grown LK-99-like samples, including the half-levitated and non-levitatedsamples. The magnetization measurements show the coexistence ofsoft-ferromagnetic and diamagnetic signals in both half-levitated andnon-levitated samples. The electrical transport measurements on the as-grownLK-99-like samples including both half-levitated and non-levitated samples showan insulating behavior characterized by the increasing resistivity with thedecreasing temperature.

Ferromagnetic and insulating behavior in both half magnetic levitation and non-levitation LK-99 like samples