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Paramagnetic Meissner Effect in Superconducting Single Crystals of Ba_{1-x}K_xBiO_3

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arxiv cond-mat/0206432 v2 pith:R3KFSVGI submitted 2002-06-23 cond-mat.supr-con

Hyun-Tak Kim , H. Minami , W. Schmidbauer , J. W. Hodby , A. Iyo , F. Iga , H. Uwe This is my paper
classification cond-mat.supr-con
keywords fieldobservedsuperconductingcrystalseffectfoundinhomogeneitymeissner
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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.

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