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首页> 外文期刊>Crystal growth & design >Tunable synthesis, growth mechanism, and magnetic properties of La0.5Ba0.5MnO3
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Tunable synthesis, growth mechanism, and magnetic properties of La0.5Ba0.5MnO3

机译：La0.5Ba0.5MnO3的可调谐合成，生长机理和磁性

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摘要

La0.5Ba0.5MnO3 products with novel flowerlike, microcube, and nanocube structures were successfully synthesized by a simple hydrothermal route by controlling the alkalinity of the reaction solutions. The synthesized products were systematically studied by X-ray powder diffraction, field-emission scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy. The results showed that the formation of the flowerlike structures with a layer assembly experienced a nucleation-aggregation-crystallization growth process, while the cubic structures experienced a nucleation-crystallization growth process due to the effect of different alkalinity in the reaction solutions. The higher alkalinity also led to a decrease in the size in the cubic structures. Suitable temperature and pressure were demonstrated to be crucial to the formation of the flowerlike structures by carrying out further control experiments. The measurement of the magnetic properties of three samples obtained at different alkaline conditions indicated that the size of the La0.5Ba0.5MnO3 products had an obvious influence on their properties; however, the dependence of the properties upon the morphology of the La0.5Ba0.5MnO3 products was minor.
机译：通过控制反应溶液的碱度，通过简单的水热途径成功合成了具有新颖花状，微立方体和纳米立方体结构的La0.5Ba0.5MnO3产物。通过X射线粉末衍射，场发射扫描电子显微镜，透射电子显微镜和能量色散X射线光谱系统地研究了合成产物。结果表明，层状花状结构的形成经历了成核-聚集-结晶生长过程，而立方结构由于反应溶液中碱度的不同而经历了成核-结晶生长过程。较高的碱度还导致立方结构的尺寸减小。通过进行进一步的对照实验，证明合适的温度和压力对花状结构的形成至关重要。对在不同碱性条件下获得的三个样品的磁性能的测量结果表明，La0.5Ba0.5MnO3产物的大小对其性能有明显影响。然而，性质对La0.5Ba0.5MnO3产物形态的依赖性很小。

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