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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Using applied pressure to guide materials design: a neutron diffraction study of La2NiO4+delta and Pr2NiO4+delta
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Using applied pressure to guide materials design: a neutron diffraction study of La2NiO4+delta and Pr2NiO4+delta

机译:用施加的压力引导材料设计:La2NiO4 + Delta和Pr2Nio4 + Delta的中子衍射研究

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摘要

The compression behaviours of La2NiO4+delta and Pr2NiO4+delta have been studied up to a pressure of 2.8 and 2.2 GPa respectively. Using neutron diffraction, the mechanism of compression, and the behaviour of the NiO6 and La/PrO9 polyhedra in these layered perovskite materials have been determined. Their compression mechanisms have then been compared to related materials (La2-xPrxNiO4, Pr2-xNdxNiO4, La2-xSrxNiO4 and Pr2-xCaxNiO4) where the unit-cell volume has been reduced by controlling the composition (x), which acts as an 'effective chemical pressure'. Understanding the effects of both has implications for materials design; pressure can be used to finely tune a property, which theoretically may then be emulated using chemical doping.
机译:La2NiO4 + Delta和PR2NiO4 + Delta的压缩行为分别研究了2.8和2.2GPa的压力。 已经确定了使用中子衍射,压缩机制,并确定了这些层状钙钛矿材料中的NiO6和La / Pol9多面体的行为。 然后将它们的压缩机制与相关材料(LA2-XPRXNIO4,PR2-XNDXNIO4,LA2-XSRXNIO4和PR2-XCAXNIO4)进行比较,其中通过控制组合物(X)减少了单位细胞体积,这充当“有效” 化学压力'。 了解两者的影响对材料设计有影响; 压力可用于精细调谐其理论上可以使用化学掺杂模拟的性质。

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