| The crystal structures and physical properties of the solid solution compound Ba5Y8-xMn4021-1.5x （x = 0, 1） |
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| 引用本文： | 高庆庆,李静波,宋士佳,饶光辉,骆军,刘广耀,梁敬魁,赵孟珂,梁艳,郜小勇,陈超,陈先梅,赵显伟.The crystal structures and physical properties of the solid solution compound Ba5Y8-xMn4021-1.5x （x = 0, 1）[J].中国物理 B,2012(6):364-369. |
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| 作者姓名： | 高庆庆 李静波 宋士佳 饶光辉 骆军 刘广耀 梁敬魁 赵孟珂 梁艳 郜小勇 陈超 陈先梅 赵显伟 |
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| 作者单位： | Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China |
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| 基金项目： | Project supported by the National Natural Science Foundation of China （Grant Nos. 50872148 and 51072225） and the National Basic Research Program of China （Grant No. 2007CB925003）. |
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| 摘 要： | New oxometallides with the formula Ba5Y8-xMn4021-1.5x （x = 0, 1） are prepared through an atmosphere-controlled solid-state reaction. Two single-phase samples with Ba/Y/Mn atomic ratios 5/8/4 （Y8） and 5/7/4 （Y7） are obtained. The crystal structures and the physical properties of the compounds are investigated by X-ray powder diffraction, magnetization, conductivity, and dielectricity measurements. The Ba5Y8-xMn4021-1.5x compound is demonstrated to be a Y-deficient solid solution. The solid solution compound Ba5Y8-xMn4021-1.5x crystallizes into tetragonal symmetry with the space group I4/m. Detailed structure analysis by Rietveld refinement of the X-ray powder diffraction data reveals that the Y vacancies occur preferentially at the Y（2） site. Thermal magnetization measurements indicate the presence of antiferromagnetic interaction between Mn ions in the compounds, and temperature-dependent resistivity measurements show that insulator-semiconductor transitions occur around 175 K and 170 K for the Y8 and Y7 samples, respectively. Strong frequency dependences of the dielectric constant are observed above -175 K for the two compounds.
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| 关 键 词： | 晶体结构 物理性质 化合物 固溶体 X-射线粉末衍射 Rietveld精修 粉末衍射数据 磁化强度 |
The crystal structures and physical properties of the solid solution compound Ba5Y8-xMn4021-1.5x （x = 0, 1） |
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| Institution: | Gao Qlng-Qlng, Li Jing-Bo, Song Shi-Jia, Rao Guang-Hui, Luo Jun, Liu GuangYao, Liang Jing-Kui(Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China) |
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| Abstract: | Ba5Y8-xMn4021-1.5x, X-ray powder diffraction, crystal structure, conductivity |
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| Keywords: | Ba5Y8-xMn4021-1 5x X-ray powder diffraction crystal structure conductivity |
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