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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.
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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