Paramagnetic Meissner Effect in Superconducting Single Crystals of   Ba_{1-x}K_xBiO_3
  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. 
Hyun-Tak Kim, H. Minami, W. Schmidbauer, J. W. Hodby, A. Iyo, F. Iga,   and H. Uwe