Vacancy ordering in Fe7Se8-Fe7S8 solid solutions studied by Mössbauer, X-ray and magnetization techniques

Vacancy ordering in Fe7Se8-Fe7S8 solid solutions studied by Mössbauer, X-ray and magnetization techniques
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通过穆斯堡尔、X 射线和磁化技术研究 Fe7Se8-Fe7S8 固溶体中的空位有序性

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发表时间:
1994
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影响因子:
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通讯作者:
P. Nordblad
P. Nordblad
中科院分区:
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文献类型:
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作者:
T. Ericsson;Ö. Amcoff;P. Nordblad

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根据X射线衍射(XRD)和磁化强度(SQUID)测量,在石英安瓿从600 °C快速冷却期间,由于阳离子空位有序,在与NiAs相关的伪二元固溶体Fe 7Se 8-Fe 7S 8中形成接近两种最终成分(Fe 7(SxSe 1 −x)8,其中x ≤0.15且x ≥0.85)的超结构。穆斯堡尔谱表明在整个区间内存在局域空位有序,但当硫的阴离子比例在15%~ 85%之间时,XRD和SQUID数据排除了长程空位有序。
Superstructures, due to cation vacancy ordering, form in the NiAs-related pseudobinary solid solution Fe7Se8-Fe7S8 close to both end compositions (Fe7(SxSe1−x)8 withx≤0.15 andx≥0.85) during rapid cooling of quartz ampoules from 600 °C, according to X-ray diffractometry (XRD) and magnetization (SQUID) measurements. Mössbauer spectroscopy indicates local vacancy ordering in the whole interval, but XRD and SQUID data exclude long-range vacancy ordering when the anion proportion of sulphur is between 15% and 85%.