  The paramagnetic Meissner effect (PME) in the field cooled susceptibility has
been observed in superconducting single crystals of Ba_{1-x}K_xBiO_3 using
magnetometers of Quantum-Design Co.. The PME is similar to that observed in
cuprates and Nb superconductors. For the Ba_{0.63}K_{0.37}BiO_3 crystal, the
PME is observed in cooling process under the field up to 750 Oe. The PME was
not found in the virgin-charged superconducting magnet. The PME is found in a
superconductor with trapped flux and may arise from a remnant field, a
temperature inhomogeneity near T_c, and a potassium-concentration
inhomogeneity.

Superconductivity