中国物理B ›› 2014, Vol. 23 ›› Issue (3): 37501-037501.doi: 10.1088/1674-1056/23/3/037501
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
谷艳红a, 刘雍a, 姚超b, 马衍伟b, 王雨c, 陈王丽华c, 陈万平a
Gu Yan-Hong (谷艳红)a, Liu Yong (刘雍)a, Yao Chao (姚超)b, Ma Yan-Wei (马衍伟)b, Wang Yu (王雨)c, Chan Helen Lai-Wah (陈王丽华)c, Chen Wan-Ping (陈万平)a
摘要: Bi0.9Ho0.1Fe0.95O3 and Bi0.9Ho0.1Fe0.9Ti0.05O3 ceramics were prepared and compared to reveal the effects of Ho and Ti codoping in BiFeO3. X-ray diffraction indicated that both ceramics had a high rhombohedral perovskite phase content, and microstructural analyses showed that the grains of the Bi0.9Ho0.1Fe0.9Ti0.05O3 ceramics were much smaller than those of Bi0.9Ho0.1Fe0.95O3. An electrical resistivity of more than 1×1014 Ω·cm at room temperature, and a magnetic hysteresis loop with a remnant magnetization 2Mr of ~0.485 emu/g were obtained for Bi0.9Ho0.1Fe0.9Ti0.05O3; both were much higher than those of Bi0.9Ho0.1Fe0.95O3. Changes in the defect subsystem of BiFeO3 induced by Fe-deficiency and (Ho,Ti) codoping are proposed as being responsible for the improvement in the properties.
中图分类号: (Magnetoelectric effects, multiferroics)