lixmn3 -x- yfeyo4尖晶石磁性有序结构的中子粉末衍射研究

Q2 Chemistry

Zeitschrift Fur Kristallographie Pub Date : 2007-11-01 DOI:10.1524/ZKSU.2007.2007.SUPPL_26.517

E. Wolska, W. Nowicki, J. Darul, M. Tovar, O. Prokhnenko, P. Piszora

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引用次数: 1

摘要

用中子粉末衍射法研究了正尖晶石LiMn2O4和反尖晶石Li0.5Fe2.5O4之间形成的LixMn3-x-yFeyO4单相固溶体的晶体结构和磁性结构。我们提出了四面体和八面体尖晶石亚晶格上阳离子分布变化的新结果，以及中子粉末衍射数据的Rietveld分析导致的晶体结构改进。研究了摩尔分数为nFe=Fe:(Fe+Mn) = 0.1 ~ 0.5的单相尖晶石固溶体。样品表现出不同的磁性，从nFe=0.1时的低温反铁磁有序，到nFe=0.472时AB2O4中A位和B位之间发生明显的铁磁(未补偿的反铁磁)交换。

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Neutron powder diffraction study on the magnetic ordering and structure of LixMn3-x-yFeyO4spinels

Crystal and magnetic structures of a LixMn3-x-yFeyO4 single phase solid solutions series, formed between the normal spinel LiMn2O4 and the inverse spinel Li0.5Fe2.5O4, have been studied using neutron powder diffraction. We present new results on the changes in cation distribution over the tetrahedral and octahedral spinel sublattices, and the crystal structure refinements resulting from Rietveld analysis of neutron powder diffraction data. Single phase spinel solid solutions, with the molar fraction nFe=Fe:(Fe+Mn) = 0.1-0.5, have been investigated. The samples reveal different magnetic properties, from antiferromagnetic ordering at low temperature for nFe=0.1, to the distinct ferrimagnetic (uncompensated antiferromagnetic) exchange occurring between A and B sites in AB2O4 for nFe=0.472.

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来源期刊

Zeitschrift Fur Kristallographie 物理-晶体学

CiteScore

1.47

自引率

0.00%

发文量

审稿时长

3 months

期刊介绍： Zeitschrift für Kristallographie International journal for structural, physical, and chemical aspects of crystalline materials ISSN 0044-2968 Founded in 1877 by Paul Groth Zeitschrift für Kristallographie is one of the world’s oldest scientific journals. In original papers, letters and review articles it presents results of theoretical or experimental study on crystallography.