Ferroelectric and Magnetic Properties of Co Doping Bi6Fe2Ti3O18 Ceramics

Chun Yan Chen; Song Hou; Xiang Yu Mao; Xiao Bing Chen

doi:10.4028/www.scientific.net/MSF.745-746.142

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HomeMaterials Science ForumMaterials Science Forum Vols. 745-746Ferroelectric and Magnetic Properties of Co Doping...

Ferroelectric and Magnetic Properties of Co Doping Bi₆Fe₂Ti₃O₁₈ Ceramics

Abstract:

In this paper, for the purpose of enhancement in the magnetic behavior, the five-layer Aurivillius phase structure Bi₆Fe_2-xCo_xTi₃O₁₈ (BFCT-x, x = 0.0 ~ 2.0) ceramics were synthesized using the solid-state reaction method from a mixture of Bi₂O₃, Co₂O₃, Fe₂O₃, and TiO₂powders with different stoichiometric ratio. The microstructure, ferromagnetic and ferroelectric properties are investigated. The crystallographic structures of BFCT-x are determined to be the typical five-layer Aurivillius phase with a suggested structural transformation at heavy doping of Co ions. At room temperature, the remnant magnetization (2M_r) of BFCT-0.0, BFCT-0.6, BFCT-1.0 and BFCT-2.0 samples are 0.043 memu/g, 0.59 emu/g, 0.81 emu/g and 1.75 memu/g, respectively. The 2M_r, at first, gradually enhance and reach a greatest value of 0.81 emu/g at x = 1.0 then degrade again with the increasing of the ratio x. At room temperature, the samples have ferroelectricity, which the remnant polarization (2P_r) of the BFCT-0.0 , BFCT-0.6, BFCT-1.0 and BFCT-2.0 samples are 2.8 μC/cm², 8.0 μC/cm², 3.0 μC/cm²and 7.2 μC/cm² respectively. The 2P_r first increases, then decreases and increases again with Co doping. When x = 0.6, the 2P_r reaches a maximum value of 8.0 μC/cm².

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Materials Science Forum (Volumes 745-746)

Pages:

142-145

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.745-746.142

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Online since:

February 2013

Authors:

Chun Yan Chen, Song Hou, Xiang Yu Mao, Xiao Bing Chen

Keywords:

Aurivillius Phase, Ceramic, Ferroelectric, Ferromagnetic

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