Abstract
New phases in the Cs–Ba–Bi–Pb–O and Cs–Sr–Bi–Pb–O systems have been synthesised using conventional solid state reaction techniques. The polycrystalline powders formed were not single phase, but XRD patterns of an unknown phase similar to a distorted perovskite structure were observed. The samples were all highly deliquescent. A nominal (Ba,Cs)(Bi 0.25Pb 0.75)O 3 composition synthesised in air shows a sharp T C onset=9 K with an observed zero-field-cooled magnetic moment at 5 K=3×10 −7 A m −2 and a similar nominal (Sr,Cs)(Bi 0.25Pb 0.75)O 3 composition subjected to a post-anneal in N 2 gas showed a T C onset=7.5±0.5 K.
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