Enhanced Magnetic and Dielectric Properties in Low-Content Tb-Doped BiFeO3 Nanoparticles
GUO Min-Chen1, LIU Wei-Fang1**, WU Ping1, ZHANG Hong1, XU Xun-Ling1, WANG Shou-Yu2, RAO Guang-Hui3
1Department of Applied Physics, Institute of Advanced Materials Physics, Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, Faculty of Science, Tianjin University, Tianjin 300072 2College of Physics and Material Science, Tianjin Normal University, Tianjin 300074 3Department of Information Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004
Abstract：Bi1?xTbxFeO3 (x=0, 0.01, 0.03 and 0.05) nanoparticles are synthesized by the sol-gel method. A single phase perovskite rhombohedral structure of all the samples is established from the Rietveld refined XRD patterns. The substitution of Tb3+ ions to Bi3+ decreases the particle size and enhances the ferromagnetic properties of this system. Interestingly a large maximum magnetization value of 1.73 emu/g at 50 kOe can be observed in 1% Tb-doped sample at 300 K. The decrease in band gap may result from the reduced particle size, while the leakage current density also decreases, which is mainly explained by the variation of oxygen vacancies.
2015, Vol. 32 
