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First-principles investigation of ferromagnetism and ferroelectricity in bismuth manganite

机译:铋锰铁矿中铁磁性和铁电的第一性原理研究

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We present results of local spin density approximation (LSDA) pseudopotential calculations for the perovskite structure oxide, bismuth manganite (BiMnO3). The origin of the differences between bismuth manganite and other perovskite manganites is determined by first calculating total energies and band structures of the high symmetry cubic phase, then sequentially lowering the magnetic and structural symmetry. Our results indicate that covalent bonding between bismuth cations and oxygen anions stabilizes different magnetic and structural phases compared with the rare earth manganites This is consistent with recent experimental results showing enhancement of charge ordering in doped bismuth manganite. [S0163-1829(99)11113-5]. [References: 54]
机译:我们介绍了钙钛矿结构氧化物,铋锰矿(BiMnO3)的局部自旋密度近似(LSDA)伪电势计算的结果。通过首先计算高对称立方相的总能量和能带结构,然后依次降低磁和结构对称性,可以确定铋锰矿和其他钙钛矿锰矿之间差异的起源。我们的结果表明,与稀土锰矿相比,铋阳离子和氧阴离子之间的共价键可稳定不同的磁性和结构相。这与最近的实验结果一致,表明掺杂的铋锰矿中电荷有序增强。 [S0163-1829(99)11113-5]。 [参考:54]

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