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- W1634569985 abstract "Low-temperature structural and magnetic properties of ${mathrm{Bi}}_{0.5}{mathrm{Sr}}_{0.5}{mathrm{MnO}}_{3}$ investigated by neutron and synchrotron x-ray diffraction are reported. High-resolution powder diffraction data evidenced two-phase coexistence. One of the phases presents charge-exchange (CE) -type magnetic ordering and $mathit{q}=frac{1}{2}{mathit{b}}^{*}$ structural modulation indicating orbital and charge ordering. The other phase adopts the A-type magnetic structure and orbital ordering with $mathit{q}=0.$ The charge order of the CE phase and the orbital order of the A phase are unusually stable when heating the sample ${(T}_{mathrm{OO}}=525 mathrm{K}).$ A mechanism, based on the ${6s}^{2}$ lone pair of ${mathrm{Bi}}^{3+}$ ions, is proposed to strongly decrease the mobility of ${e}_{g}$ electrons in both phases. This fact, as well as some structural and magnetotransport results, indicates that the A-phase is quite different from previous A phases found in manganites and it cannot be described as a ``metallic antiferromagnet.'' A possible ordered arrangement of the ${mathrm{Mn}}^{3+}/{mathrm{Mn}}^{4+}$ ions in this phase is examined." @default.
- W1634569985 created "2016-06-24" @default.
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- W1634569985 date "2001-06-26" @default.
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- W1634569985 title "Low-temperature charge and magnetic order of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Bi</mml:mi></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>Sr</mml:mi></mml:mrow><mml:mrow><mml:mn>0.5</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>MnO</mml:mi></mml:mrow><mml:mrow><…" @default.
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- W1634569985 doi "https://doi.org/10.1103/physrevb.64.054401" @default.
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