Possible Meissner Effect Near Room Temperature in Copper-substituted Lead Apatite – LK99 China Experiment
With copper-substituted lead apatite below room temperature, Chinese researchers observe diamagnetic dc magnetization under magnetic field of 25 Oe with remarkable bifurcation between zero-field-cooling and field-cooling measurements, and under 200 Oe it changes to be paramagnetism. A glassy memory effect is found during cooling. Typical hysteresis loops for superconductors are detected below 250 K, along …