aSchool of Science, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, P R China
bSchool of Opto-Electronic Engineering, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China
cKey Laboratory for Organic Electronics & Information Displays (KLOEID), Institute of Advanced Materials (IAM), Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China
dSchool of Telecommunications and Information Engineering, Nanjing University of Posts and Telecommunications (NUPT), Nanjing 210046, PR China
Abstract
In this paper we report the structural, magnetic, and ferroelectric properties of Bi1−xErxFe0.95Co0.05O3 (x=0, 0.05, 0.10, 0.15) samples prepared by the sol-gel method. X-ray diffraction analysis revealed a phase transition from rhombohedral to orthorhombic structure with 15% Er doping. This structural phase transition resulted in the significantly improved magnetic properties (Ms=1.963 emu/g at 70 kOe). The leakage current decreases with the increasing Er concentration. And the most pronounced polarization hysteresis loops were observed at x=0.10, giving a high Pr of 18.5 μC/cm2 (under about 7 kV/cm). However, the ferroelectric properties dramatically decreased at x=0.15 due to the structural phase transition.
