  With copper-substituted lead apatite below room temperature, we 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 with an asymmetry between forward and backward sweep of magnetic
field. Our experiment suggests at room temperature the Meissner effect is
possibly present in this material.
