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Chin. Phys. B, 2014, Vol. 23(3): 037501    DOI: 10.1088/1674-1056/23/3/037501

Ho and Ti co-doped BiFeO3 multiferroic ceramics with enhanced magnetization and ultrahigh electrical resistivity

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
a Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology, Wuhan University, Wuhan 430072, China;
b Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing 100190, China;
c Department of Applied Physics and Materials Research Centre, The Hong Kong Polytechnic University, Kowloon, Hong Kong, China
Abstract  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.
Keywords:  BiFeO3      multiferroics      magnetism      resistivity  
Received:  02 August 2013      Revised:  22 September 2013      Accepted manuscript online: 
PACS:  75.85.+t (Magnetoelectric effects, multiferroics)  
  77.80.-e (Ferroelectricity and antiferroelectricity)  
  72.20.-i (Conductivity phenomena in semiconductors and insulators)  
Fund: Project supported by the National Basic Research Program of China (Grant No. 2009CB939705) and the National Natural Science Foundation of China (Grant No. J1210061).
Corresponding Authors:  Chen Wan-Ping     E-mail:

Cite this article: 

Gu Yan-Hong (谷艳红), Liu Yong (刘雍), Yao Chao (姚超), Ma Yan-Wei (马衍伟), Wang Yu (王雨), Chan Helen Lai-Wah (陈王丽华), Chen Wan-Ping (陈万平) Ho and Ti co-doped BiFeO3 multiferroic ceramics with enhanced magnetization and ultrahigh electrical resistivity 2014 Chin. Phys. B 23 037501

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