Structure and multiferroic properties of Y-doped BiFe03 ceramics

• 来源期刊: 科学通报(英文版)
• 学科: 化学
• 关键词: 晶体结构 性能 Y掺杂 陶瓷 BiFeO3 拉曼散射光谱 相对介电常数 铁电薄膜
• 年，卷（期）: 2010,（4）
• 所属期刊栏目: ARTICLES
• 页码范围: 452-456
• 页数: 5页
• 分类号: O614.121 O513
• 语种: 英文

摘要

Bismuth ferrite, BiFeO3, is an important multiferroic material, which simultaneously exhibits ferroelectric ordering and anti- ferromagnetic ordering in bulk form. Samples of Bi1-xYxFeO3 (x=0, 0.05, 0.10, 0.15 and 0.20) were prepared by conventional solid state reaction. By X-ray diffraction and Raman scattering spectra, the crystal structures of the samples were identified as rhombohedral with R3c space group, in addition to a second phase at x≥0.05. Multiferroic properties of the samples were also measured. With the increasing of Y content, the relative dielectric constants of the samples increased gradually, while the loss tangents firstly decreased and then began to increase. Meanwhile, the saturation magnetization values were significantly enhanced, namely 0.1440, 0.7468, 1.9217, 3.3309 and 6.2774 emu/g at 300 K for x=0, 0.05, 0.10, 0.15 and 0.20, respectively.