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- W2494989285 abstract "The origins of up-up-down-down ($ensuremath{uparrow}ensuremath{uparrow}ensuremath{downarrow}ensuremath{downarrow}$) magnetic structure and ferroelectricity discovered in multiferroic ${mathrm{Lu}}_{2}{mathrm{CoMnO}}_{6}$ have been studied on the basis of first-principles calculations. The energy of $ensuremath{uparrow}ensuremath{uparrow}ensuremath{downarrow}ensuremath{downarrow}$ spin order is very close to that of ferromagnetic order, which is caused by the weak out-of-plane nearest-neighbor exchange coupling and the exchange-striction effect. However, the ground state turns out to be of ferromagnetic order, and can be reversed if the out-of-plane bond angle decreases. We propose that the presence of $ensuremath{upuparrows}ensuremath{downdownarrows}$ spin order is related to the Co-Mn antisite disorder in the polycrystalline sample. The origin of ferroelectricity is independent of the charge order, and the exchange-striction mechanism induces the ferroelectricity through the bond-bending rather than the bond-stretching effect present in ${mathrm{Ca}}_{3}{mathrm{CoMnO}}_{6}$." @default.
- W2494989285 created "2016-08-23" @default.
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- W2494989285 date "2016-02-19" @default.
- W2494989285 modified "2023-10-10" @default.
- W2494989285 title "Origins of<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:mo>↑</mml:mo><mml:mo>↑</mml:mo><mml:mo>↓</mml:mo><mml:mo>↓</mml:mo></mml:mrow></mml:math>magnetic structure and ferroelectricity in multiferroic<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML><mml:mrow><mml:msub><mml:mi>Lu</mml:mi><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mi>CoMnO</mml:mi><mml:mn>6</mml:mn></mml:msub></mml:mrow></mml:math>" @default.
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- W2494989285 doi "https://doi.org/10.1103/physrevb.93.075140" @default.
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