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

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Author(s): GAI Zhen-Tao, YU Li-Ming, ZHOU Yun, ZHAO Xin-Luo, ZHANG Jin-Cang

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 25;
Issue: 11;
Start page: 1155;
Date: 2010;
Original page

Keywords: dielectric property | magnetic property | magnetoelectric voltage coefficient

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.
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