多铁性单相固溶体的制备与磁性能
(中国科学院 金属研究所，沈阳 110016)
摘 要: 采用溶胶−凝胶法制备具有复合钙钛矿结构的单相固溶体(1−x)Pb(Fe2/3W1/3)O3-xBiFeO3，利用X射线衍射技术对其晶体结构进行研究，结合扫描电镜观察分析其形貌尺寸，并对不同掺杂条件下固溶体的磁性能进行测试。结果表明： BiFeO3的加入能降低Pb(Fe2/3W1/3)O3的烧结温度，当掺杂系数x由0.1 增加到0.6时，对应的单相烧结温度由700 ℃降低到550 ℃。当x≤0.6时，其晶体结构为钙钛矿型结构；而当x＞0.6时，晶体结构不再为单一钙钛矿相。其中，当x =0.25时的单相钙钛矿结构固溶体0.75Pb(Fe2/3W1/3)O3-0.25BiFeO3的磁性能比较突出。
关键字: 钙钛矿；多铁性材料；溶胶−凝胶法；显微结构；磁性能
single phase solid solution Pb(Fe2/3W1/3)O3-BiFeO3
（Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China）
Abstract:(1−x)Pb(Fe2/3W1/3)O3-xBiFeO3 single phase solid solution was synthesized by sol-gel method. The crystal structures and morphologies were studied by X-ray diffractometry and scanning electron microscopy, respectively, and its magnetic performance was also investigated. The results show that the addition of BiFeO3 decreases the sintering temperature of Pb(Fe2/3W1/3)O3 from 700 to 550 ℃, as the doping coefficient x increases from 0.1 to 0.6. When x≤0.6, the crystal structure is confirmed as perovskite type indicating a single phase solid solution, whereas it cannot keep the same perovskite structure when x＞0.6. The single phase solid solution 0.75Pb(Fe2/3W1/3)O3-0.25BiFeO3 displays better magnetization than any others when x=0.25.
Key words: perovskite; multiferroic material; sol-gel method; microstructure; magnetization
