| La0.1Bi0.9-xEuxFeO3化合物的结构与性能研究 |
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| 引用本文： | 刘延辉,李静波,梁敬魁,骆 军,纪丽娜,张继业,饶光辉.La0.1Bi0.9-xEuxFeO3化合物的结构与性能研究[J].物理学报,2008,57(10):6476-6481. |
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| 作者姓名： | 刘延辉 李静波 梁敬魁 骆 军 纪丽娜 张继业 饶光辉 |
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| 作者单位： | (1)中国科学院物理研究所北京凝聚态物理国家实验室，北京 100190; (2)中国科学院物理研究所北京凝聚态物理国家实验室，北京 100190；中国科学院国际材料物理中心，沈阳 110016 |
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| 基金项目： | 国家重点基础研究发展计划(973)项目(批准号：2007CB925003)和国家自然科学基金(批准号：50542006)资助的课题. |
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| 摘 要： | 利用固相反应烧结技术制备La0.1Bi0.9-xEuxFeO3系列化合物. 利用X射线粉末衍射进行物相鉴定和结构分析，确定了材料的相关系：x≤0.05，材料为R3c结构相；0.08≤x≤0.12，材料为赝R3c结构相；x≥0.15是Pbnm相，其中0.15≤x≤0.20区域Pbnm相存在畸变. 磁测量结果表明，材料具有弱铁磁性，对于x≤0.20材料，磁矩在x=0.12成分存在极值. 利用阻抗分析仪测量了室温介电常数随成分的变化关系.讨论了材料的结构与弱铁磁性和室温介电常数间的关系.
关键词：
0.1Bi0.9-xEuxFeO3')" href="#">La0.1Bi0.9-xEuxFeO3
X射线衍射
磁性
介电常数
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| 关 键 词： | La0.1Bi0.9-xEuxFeO3 X射线衍射 磁性 介电常数 |
| 收稿时间： | 2008-04-28 |
Structure and physical properties of La0.1Bi0.9-xEuxFeO3 compounds |
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| Liu Yan-Hui,Li Jing-Bo,Liang Jing-Kui,Luo Jun,Ji Li-N,Zhang Ji-Ye and Rao Guang-Hui.Structure and physical properties of La0.1Bi0.9-xEuxFeO3 compounds[J].Acta Physica Sinica,2008,57(10):6476-6481. |
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| Authors: | Liu Yan-Hui Li Jing-Bo Liang Jing-Kui Luo Jun Ji Li-N Zhang Ji-Ye and Rao Guang-Hui |
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| Abstract: | In this work, La0.1Bi0.9-xEuxFeO3 compounds were prepared by solid-state reaction. The phase relation at room temperature was investigated by X-ray powder diffraction. A rhombohedral (R3c) phase exists for x≤0.05; for 0.08≤x≤0.12 a pseudo-R3c phase is found; for x≥0.15 it is an orthorhombic (Pbnm) phase, while the distortion of the Pbnm phase was observed for the composition range of 0.15≤x≤0.20. Magnetic measurements indicate that weak ferromagnetism exists in all the compounds, and for the compounds with x≤0.20 the magnetic moment has the maximum value at x=0.12. The composition dependence of dielectric constant was investigated at room temperature. The relationship between the structure and the physical properties was discussed. |
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| Keywords: | La0 1Bi0 9-xEuxFeO3 X-ray diffraction magnetism dielectric constant |
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