Colossal permittivity and the polarization mechanism of (Mg, Mn) co-doped LaGaO3 ceramics

doi:10.1063/1.5013264

	Colossal permittivity and the polarization mechanism of (Mg, Mn) co-doped LaGaO3 ceramics
	Luo, Tingting 1; Liu, Zhifu ; Zhang, Faqiang ; Li, Yongxiang 2
刊名	JOURNAL OF APPLIED PHYSICS
	2018
卷号	123 期号:12
ISSN号	0021-8979
DOI	10.1063/1.5013264
英文摘要	Mg and Mn co-doped LaGa0.7-xMgxMn0.3O3 (x = 0, 0.05, 0.10, 0.15) ceramics were prepared by a solid-state reaction method. The electrical properties of the LaGa0.7-xMgxMn0.3O3 ceramics were studied in detail by dielectric spectra, impedance spectra, and I-V characteristic analysis. Colossal permittivity up to 10(4) could be obtained across the frequency range up to 10(4) Hz. The impedance analysis of the co-doped LaGaO3 ceramics indicated that the Mott's variable range hopping (VRH) polarization should be the main origin of colossal permittivity. Mg and Mn co-doping suppressed the formation of Mn3+ thorn and enhanced the VRH polarization, resulting in increased permittivity. Partial localization of electrons by Mg reduced the long-range electron hopping and led to the decrease in dielectric loss. Published by AIP Publishing.
学科主题	Physics, Applied
出版者	AMER INST PHYSICS
WOS记录号	WOS:000428821100020
资助机构	The authors acknowledge the financial support from the 973 Program (2015CB654604 and 2015CB654605), the National Natural Science Foundation of China (51572279), and the International Science and Technology Cooperation Program of China (2015DFA51100). The authors would also like to give special thanks to Professor Guorong Li for his kind help with the dielectric property measurements and valuable discussions. ; The authors acknowledge the financial support from the 973 Program (2015CB654604 and 2015CB654605), the National Natural Science Foundation of China (51572279), and the International Science and Technology Cooperation Program of China (2015DFA51100). The authors would also like to give special thanks to Professor Guorong Li for his kind help with the dielectric property measurements and valuable discussions.
内容类型	期刊论文
源URL	[http://ir.sic.ac.cn/handle/331005/25078]
专题	中国科学院上海硅酸盐研究所
作者单位	1.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Devices, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing, Peoples R China 3.RMIT Univ, Sch Engn, Melbourne, Vic 3001, Australia
推荐引用方式 GB/T 7714	Luo, Tingting,Liu, Zhifu,Zhang, Faqiang,et al. Colossal permittivity and the polarization mechanism of (Mg, Mn) co-doped LaGaO3 ceramics[J]. JOURNAL OF APPLIED PHYSICS,2018,123(12).
APA	Luo, Tingting,Liu, Zhifu,Zhang, Faqiang,&Li, Yongxiang.(2018).Colossal permittivity and the polarization mechanism of (Mg, Mn) co-doped LaGaO3 ceramics.JOURNAL OF APPLIED PHYSICS,123(12).
MLA	Luo, Tingting,et al."Colossal permittivity and the polarization mechanism of (Mg, Mn) co-doped LaGaO3 ceramics".JOURNAL OF APPLIED PHYSICS 123.12(2018).