Effect of La substitution on the struture and multiferroic properties of BiFeO3-PbTiO3 crystalline solutions

摘要：

Crystalline Solutions of 0.6(Bi1- xLax)FeO3-0.4PbTiO3 (BLF-PT) for x=0, 0.1 and 0.2 have been synthesized by the solid-state reaction method. X-ray diffraction results reveal that BLF-PT of x=0 has the strong tetragonal distortion with the c/a ratio of about 1.17. However, the La substitution modifies BLF-PT into the rhombohedral structure. The dielectric loss at low frequency (102 ~ 104 Hz) is significantly reduced by addition of La. Moreover, the giant remnant polarization of 64.8 μC/cm2 is achieved for BLF-PT of x=0.2. The weak ferromagnetic phenomenon in BLF-PT is observed with the increase of La concentration. X-ray photoelectron spectroscopy (XPS) investigation shows that the valent variation of Fe3+→Fe2+ could be effectively suppressed by La substitution.

作者: Jianguo Chen Guiyang Shi Shengwen Yu Jinrong Cheng

作者单位: School of Materials Science and Engineering,Shanghai University,149 Yanchang Road Shanghai,200072,China

会议类型: 国际会议

会议名称: 2009 The 18th IEEE International Symposium on Applications of Ferroelectrics(2009年国际铁电学暨IEEE国际铁电应用联合会议)

会议地点: 西安

会议语种:英文

页码: 87-90

在线出版日期: 2009-08-23（万方平台首次上网日期，不代表论文的发表时间）