| Improved multiferroic properties of La-doped 0.6BiFeO3—0.4SrTiO3 solid solution ceramics |
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| 引用本文： | 马争争,李建青,田召明,邱洋,袁松柳.Improved multiferroic properties of La-doped 0.6BiFeO3—0.4SrTiO3 solid solution ceramics[J].中国物理 B,2012,21(10):107503-107503. |
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| 作者姓名： | 马争争 李建青 田召明 邱洋 袁松柳 |
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| 作者单位： | School of Physics,Huazhong University of Science and Technology;School of Sciences,Wuhan University of Science and Technology |
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| 基金项目： | Project supported by the Science Foundation from the Ministry of Education,China （Grant Nos. 20090142120069 and 309020）; the Special Scientific Foundation from the Chinese Central University （Grant No. 20102D006） |
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| 摘 要： | The 0.6（Bi1-xLax）FeO 3-0.4SrTiO 3（x = 0,0.1） multiferroic ceramics are prepared by a modified Pechini method to study the effect of substitution of SrTiO3 and La in BiFeO3.The X-ray diffraction patterns confirm the single phase characteristics of all the compositions each with a rhombohedral structure.The magnetic properties of the ceramics are significantly improved by a solid solution with SrTiO3 and substitution of La.The values of the dielectric constant ε r and loss tangent tan δ of all the samples decrease with increasing frequency and become constant at room temperature.The La-doped 0.6BiFeO3-0.4SrTiO3 ceramics exhibit improved dielectric and ferroelectric properties,with higher dielectric constant enhanced remnant polarization（Pr） and lower leakage current at room temperature.Compared with a anti-ferromagnetic BiFeO3 compound,the 0.6（Bi0.9La0.1）FeO3-0.4SrTiO3 sample shows the optimal ferromagnetism with remnant magnetization M r ～ 0.135 emμ/g and ferroelectricity with Pr ～ 5.94 μC/cm 2 at room temperature.
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| 关 键 词： | 陶瓷制备 La掺杂 固溶体 SrTiO3陶瓷 电性能 BiFeO3 Pechini法 介电常数 |
| 收稿时间： | 2012-02-09 |
Improved multiferroic properties of La-doped 0.6BiFeO3-0.4SrTiO3 solid solution ceramics |
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| Ma Zheng-Zheng,Li Jian-Qing,Tian Zhao-Ming,Qiu Yang,Yuan Song-Liu.Improved multiferroic properties of La-doped 0.6BiFeO3-0.4SrTiO3 solid solution ceramics[J].Chinese Physics B,2012,21(10):107503-107503. |
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| Authors: | Ma Zheng-Zheng Li Jian-Qing Tian Zhao-Ming Qiu Yang Yuan Song-Liu |
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| Institution: | a School of Physics, Huazhong University of Science and Technology, Wuhan 430074, China;b School of Sciences, Wuhan University of Science and Technology, Wuhan 430070, China |
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| Abstract: | The 0.6(Bi1-xLax)FeO3-0.4SrTiO3 (x=0, 0.1) multiferroic ceramics are prepared by a modified Pechini method to study the effect of substitution of SrTiO3 and La in BiFeO3. The X-ray diffraction patterns confirm the single phase characteristics of all the compositions each with a rhombohedral structure. The magnetic properties of the ceramics are significantly improved by a solid solution with SrTiO3 and substitution of La. The values of the dielectric constant εr and loss tangent tan δ of all the samples decrease with increasing frequency and become constant at room temperature. The La-doped 0.6BiFeO3-0.4SrTiO3 ceramics exhibit improved dielectric and ferroelectric properties, with higher dielectric constant enhanced remnant polarization (Pr) and lower leakage current at room temperature. Compared with a anti-ferromagnetic BiFeO3 compound, the 0.6(Bi0.9La0.1)FeO3-0.4SrTiO3 sample shows the optimal ferromagnetism with remnant magnetization Mr～0.135 emμ/g and ferroelectricity with Pr～5.94 μC/cm2 at room temperature. |
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| Keywords: | multiferroic ferroelectric dielectric constant ferromagnetic |
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