Structure investigation of InGaZn1-xCuxO4 (x=0-1) and magnetic property of InGaCuO4
Structure investigation of InGaZn1-xCuxO4 (x=0-1) and magnetic property of InGaCuO4
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InGaZn1-xCuxO4 (x=0-1)的结构研究及InGaCuO4的磁性能
DOI：
10.1016/j.jssc.2019.03.049
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发表时间：
2019
影响因子：
3.3
通讯作者：
Yang Tao
中科院分区：
文献类型：
--
作者：
Xu Chunling;Jiang Pengfei;Cong Rihong;Yang Tao
首次采用溶胶-凝胶法制备了一系列层状化合物InGaZn 1-xCuxO 4（x= 0−1），并对其进行了粉末X射线衍射（PXRD）表征。这些固溶体均为LnFe_2 O_4型结构，在R_（-3）m范围内结晶。随着Cu ~（2+）含量的增加，InGaZn_（1-x）Cu_xO_4的晶格表现出各向异性，c轴和a轴分别线性收缩和膨胀。对PXRD数据的Rietveld精修表明，Cu 2 +/Zn 2+和In 3+阳离子分别存在于（Cu/Zn）O 5基三角双锥（TBP）双层和八面体层中。由于Cu ~（2+）的Jahn-Teller活性（d_9）以及Cu ~（2+）的阳离子尺寸（r= 0.65 μ m）比Zn ~（2+）（r = 0.68 μ m）小，（Cu/Zn）O_5三角双锥的顶键收缩，底键膨胀，导致了结构的各向异性变化。
A series of layered compounds InGaZn1-xCuxO4(x= 0−1) were prepared by sol-gel method for the first time and characterized by powder X-ray diffraction (PXRD). All these solid solutions adoptLnFe2O4-type structure and crystallize inR-3m. With an increase of Cu2+-content in InGaZn1-xCuxO4, the lattice showed an anisotropic change with a linear shrinkage and expansion ofc- anda-axis, respectively. Rietveld refinements against PXRD data revealed that Cu2+/Zn2+and In3+cations reside in the (Cu/Zn)O5-based trigonal bipyramids (TBP) double layers and octahedral layers, respectively. And the anisotropic structure change stems from the dramatic contraction ofM-Oapicalbonds and slight expansion ofM-Obasalbonds for the (Cu/Zn)O5trigonal bipyramids, due to the Jahn-Teller active Cu2+(d9) and smaller cationic size of Cu2+(r= 0.65 Å) compared to Zn2+(r= 0.68 Å).