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稀土过渡金属CaCu_5型衍生化合物结构的原子级模拟 被引量:1

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摘要 稀土过渡族金属化合物是功能材料研究领域的重要对象。回顾了CaCu_5衍生型稀土过渡金属化合物R_(n-m)M_(5n+2m)结构和变换关系的传统内容、含义,以及在应用中的有效性和局限性,随后从原子间相互作用势出发,通过能量最小化对5类二元本征结构SmFe_5,Sm_2Fe_(17)(H),Sm_2Fe_(17)(R),SmFe_(12)(t),Sm_3Fe_(29)的空间群及晶格参数进行了计算,并由此确定了这5类结构间的变换矩阵,与传统矩阵变换关系作了一一对照,分析了它们相近和相异的原因。最后,讨论第三元素Cr,Ti对Sm_3Fe_(29)结构的稳定作用,和对晶体几何参数及X光谱的影响,这都是传统矩阵变换反映不了的。
出处 《自然科学进展》 北大核心 2003年第4期337-342,共6页
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同被引文献13

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