Effect of Mn Substitution on Microstructures, Dielectric and Magnetic Properties of BiFeO₃ Ceramics

Abstract:

Pure BiFeO₃ ceramics and BiMn_xFe_1-xO₃ (x=0.1, 0.15, 0.2, and 0.25) ceramics were prepared by sol-gel method. A structural phase transition from rhombohedral R3c to triangle R3m occurred in Mn-doped BFO ceramics. Mn-doped BFO ceramics exhibited better crystallinity, larger dielectric constant as well as smaller dielectric loss. Besides, a small nonlinearity of magnetization-field curves M(H) was observed, the remanent magnetization increased with the increase of manganese content, and all the BiMn_xFe_1-xO₃ ceramics showed the typical antiferromagnetic, which could be attributed to the effective decrease in the concentration of oxygen vacancies, and the corresponding structural transition.

• Periodical: Materials Science Forum (Volume 815)
• Pages: 188-193
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.815.188
• Online since: March 2015
• Authors: Xiao Ling Deng*, Wei Cai, Chun Lin Fu, Yu Qin Zhang, Rong Li Gao, Gang Chen, Jia Mu Huang
• Keywords: Bismuth Ferrite, Ceramic, Dielectric, Doping, Magnetic Properties

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