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YBaCo_4O_7及YBaCo_4O_(8.5)中六角超结构的电子衍射分析

An electron diffraction study of YBaCo_4O_7 and the hexagonal superstructure in YBaCo_4O_(8.5)
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摘要 制备了氧化学剂量样品YBaCo4O7,通过电子衍射谱分析确定为六角结构,晶格常数a=0.629(5)nm,c=1.023(5)nm;制备的氧非化学剂量样品YBaCo4O8.5中,过量的氧是以超结构的方式存在.通过电子衍射方法确定了其中一种六角超结构相,其晶格参数as=bs=1.090(4)nm,cs=1.002(6)nm. The Oxygen-stoichiometric sample YBaCo4O7 was measured to be a hexagonal lattice with the parameters of a=0.629（5） nm,c=1.023（5） nm by electron diffraction.And we investigated a superstructure in oxygen non-stoichiometric material YBaCo4O8.5,which is a 3×3×1 hexagonal structure（as=bs=1.090（4） nm,cs=1.002（6） nm） with respect to its parent hexagonal structure.This study advances the understanding of the structural properties for YBaCo4O7＋δ and related transition-metal oxide systems.
作者 贾艳 戴瑞
机构地区 东北师范大学物理学院
出处 《东北师大学报（自然科学版）》 CAS CSCD 北大核心 2011年第1期67-71,共5页 Journal of Northeast Normal University(Natural Science Edition)
基金 吉林省科技发展计划项目(20090533) 中央高校基本科研业务专项资金资助项目(20090201)
关键词 电子衍射 超结构 YBaCo4O7 YBaCo4O8.5 electron diffraction superstructure YBaCo4O7 YBaCo4O8.5
分类号 O766.4 [理学—晶体学]
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参考文献15

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东北师大学报（自然科学版）
2011年 第1期

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