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Publications (1)

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    Kengo Oka · Masaki Azuma · Shigeto Hirai · [...] · Yuich Shimakawa
    [Show abstract] [Hide abstract] ABSTRACT: A tetragonal perovskite PbMnO(3) was obtained by treating the 6H hexagonal perovskite phase at 15 GPa and 1273 K. Structural analysis using synchrotron X-ray diffraction suggested that PbMnO(3) crystallizes in the centrosymmetric space group P4/mmm, unlike PbTiO(3) and PbVO(3) which have a polar structure in space group P4mm. Iodometric titration revealed the presence of the oxygen deficiency of x = 0.06 for PbMnO(3-x). The hexagonal 6H and the 3C perovskite phases exhibited antiferromagnetic ordering at 155 and 20 K, respectively.
    Full-text Article · Apr 2009 · Inorganic Chemistry