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

doi:10.1088/1674-1056/23/3/037501

Abstract Bi_0.9Ho_0.1Fe_0.95O₃ and Bi_0.9Ho_0.1Fe_0.9Ti_0.05O₃ 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 Bi_0.9Ho_0.1Fe_0.9Ti_0.05O₃ ceramics were much smaller than those of Bi_0.9Ho_0.1Fe_0.95O₃. An electrical resistivity of more than 1×10¹⁴ Ω·cm at room temperature, and a magnetic hysteresis loop with a remnant magnetization 2M_r of ～0.485 emu/g were obtained for Bi_0.9Ho_0.1Fe_0.9Ti_0.05O₃; both were much higher than those of Bi_0.9Ho_0.1Fe_0.95O₃. 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: wpchen@whu.edu.cn

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

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