无机材料学报 ›› 2010, Vol. 25 ›› Issue (11): 1155-1158.DOI: 10.3724/SP.J.1077.2010.01155

• 研究论文 • 上一篇    下一篇

xCoAl0.2Fe1.8O4+(1-x)BaTiO3纳米磁电复合材料的磁、介电和磁电特性研究

盖振涛1, 郁黎明1, 周 云1,2, 赵新洛1, 张金仓1   

  1. (1. 上海大学 物理系, 上海200444; 2. 中国计量学院 物理系, 杭州 310018)
  • 收稿日期:2010-02-21 修回日期:2010-05-10 出版日期:2010-11-20 发布日期:2010-11-01
  • 基金资助:

    国家自然科学基金(10974131); 上海市纳米专项基金(0952nm07100)

Magnetic Dielectric and Magnetoelectric Properties of Magnetoelectric Nano-composites xCoAl0.2Fe1.8O4+(1-x)BaTiO3

GAI Zhen-Tao 1, YU Li-Ming 1, ZHOU Yun 1,2, ZHAO Xin-Luo 1, ZHANG Jin-Cang 1   

  1. (1. Department of Physics, Shanghai University, Shanghai 200444, China; 2. Department of Physics, China Jiliang University,
    Hangzhou 310018, China)
  • Received:2010-02-21 Revised:2010-05-10 Online:2010-11-20 Published:2010-11-01
  • Supported by:

    National Natural Science Foundation of China (10974131) ;Shanghai Nano-technology Promotion Center and the Science &Technology Committee of Shanghai Municipality (0952nm07100)

摘要: 采用溶胶-凝胶方法制备了xCoAl0.2Fe1.8O4+(1-x)BaTiO3纳米磁电复合材料. XRD图谱分析表明烧结后的样品是复合的钙钛矿(BaTiO3)和尖晶石(CoAl0.2Fe1.8O4)结构, SEM图像显示复合材料颗粒大小均匀. 用磁滞回线研究了材料的磁性能, 并通过Koops双层异质结构模型解释了复合材料的介电频散现象. 测量结果表明: 0.20CoAl0.2Fe1.8O4+ 0.80BaTiO3的样品在偏置磁场为1.35×105A/m 时表现出最大的磁电电压系数1.075×10-2 V/A.

关键词: 介电特性, 磁特性, 磁电电压系数

Abstract: Magnetoelectric nano-composites xCoAl0.2Fe1.8O4+(1-x)BaTiO3 were prepared by Sol-Gel method. The presence of perovskite BaTiO3 and spinel CoAl0.2Fe1.8O4 in the sintered composites was proved by XRD patterns. SEM images showed that particle size of composite was uniform. The magnetic property of composites was tested by magnetic hysteresis loops and dispersion of dielectric constant was explained with Koops two layer inhomogeneous dielectric structure model. The maximum value of magnetoelectric voltage coefficient viz. 1.075×10-2V/A was obtained for 0.20CoAl0.2Fe1.8O4+0.80BaTiO3 composite at the DC magnetic bias field of 1.35×105A/m.

Key words: dielectric property, magnetic property, magnetoelectric voltage coefficient

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