Effects of Ba and Ti co-doping on BiFeO3 multiferroic ceramics optimized through two-step doping
Effects of Ba and Ti co-doping on BiFeO3 multiferroic ceramics optimized through two-step doping作者机构：Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education School of Physics and Technology Wuhan University Wuhan Hubei 430072 China School of Physics and Electronic Information Luoyang Normal College Luoyang Henan 471022 China School of Materials Science and Engineering Nanchang University Nanchang Jiangxi 330031 China
出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)
年 卷 期：2016年第5卷第3期
页 面：204-209页
核心收录：
学科分类：0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学]
基 金：the National Natural Science Foundation of China the National High-tech R&D Program of China
主 题：BiFeO3 doping multiferroic nonstoichiometric
摘 要：Ceramics of Bi0.9Ba0.1Fe0.925TixO3 (x = 0.0625, 0.08125, 0.0875, and 0.11) were prepared according to two doping strategies: one is called single-step doping in which Ba and Ti were doped together in calcination, while the other one is called two-step doping in which Ba and Ti were doped in calcination and sintering, respectively. Compared with samples prepared with single-step doping, those prepared with two-step doping have obviously different XRD patterns and small grains, and are dramatically improved in dielectric loss, resistivity, and remnant magnetization. A low dielectric loss of 0.05 at 10(3) Hz, a high resistivity of 4x10(12) ***, and a large remnant magnetization of 1.5 emu/g, have been obtained simultaneously for Bi0.9Ba0.1Fe0.925Ti0.11O3 prepared with two-step doping. The contrast between these two doping strategies clearly reveals the importance of establishing a proper doping strategy when two or more elements are co-doped to BiFeO3.
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