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Local crystal structure of multiferroic system BiMnO$$_3$$ by atomic pair distribution function analysis

Kodama, Katsuaki   ; Iikubo, Satoshi; Shamoto, Shinichi  ; Belik, A. A.*; Muromachi, Eiji*

We have studied the local crystal structure of a multiferroic system BiMnO$$_3$$ by means of atomic pair distibution function (PDF) analysis on neutron powder diffraction data. The domains with space group $$P2$$ or $$P2_1$$ whose atomic shifts break a symmetry of $$C$$-center exist in the bulk BiMnO$$_3$$ with a space group $$C2$$, which is consistent with recent results of electron diffraction. The domain size is larger than 100 $$mathrm{AA}$$, also estimated by the PDF analysis. Because domains which have atomic shifts with different directions, typically the opposite direction, also exist, the bulk material "apparently" has a space group $$C2$$.

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Category:Physics, Multidisciplinary

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