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未掺杂CeO2室温铁磁性起源
作者:王雷妮   
单位:(安徽三联学院实验教学中心 合肥 230601) 
关键词:氧化铈 密度泛函理论计算 室温铁磁性 氧空位 
分类号:TB34
出版年,卷(期):页码:2018,46(7):0-0
DOI:
摘要:

采用水热法制备不同晶粒尺寸的CeO2纳米颗粒,通过X射线衍射仪、扫描电子显微镜、X射线光电子能谱和震动样品磁强计(VSM)分析产物性能,表明未掺杂的CeO2纳米颗粒具有室温铁磁性。通过实验与理论分析了未掺杂CeO2纳米颗粒室温铁磁性的起源,结果表明:未掺杂CeO2铁磁性是由氧空位引起的,使用密度泛函理论计算结果表明:当CeO2存在氧空位时会使Ce 4f电子发生轨道极化,从而使CeO2产生净磁矩且氧空位越多磁性越强。这项研究可能有助于开发磁性可控的CeO2纳米结构。

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