Low-frequency magnetoelectric coupling of Tb1-xDyxFe2-y -BaTi0.99Mn0.01O3+δ layered composites

被引：0

作者：

Cao, Hongxia ^{[1
,2
]}

Liu, Qingquan ^{[1
,2
]}

Wang, Youbao ^{[1
,2
]}

机构：

[1] Jiangsu Key Laboratory of Meteorological Observation and Signal Processing, Nanjing University of Information Science and Technology, Nanjing 210044, China

[2] College of Electronic and Information Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China

来源：

Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2013年 / 30卷 / 06期

关键词：

Constitutive equations - Ternary alloys - Sol-gels - Barium titanate - Rare earths - Piezoelectric materials;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A elastic mechanics model was introduced to derive the magnetoelectric voltage coefficients of magnetostrictive-piezoelectric bilayer according to the constitutive equations. The transverse magnetoelectric coupling of Tb1-xDyxFe2-y- BaTiO3 layered composites were calculated by using the corresponding material parameters of individual phases. 1.0%(mole fraction) Mn doped BaTiO3(BaTi0.99Mn0.01 O3+δ) was synthesized with sol-gel technique. Layered composites were fabricated by binding discs of rare earth alloy Tb1-xDyxFe2-y and Mn doped BaTiO3, and the transverse magnetoelectric was investigated. XRD and DSC analysis show that Mn doped BaTiO3keeps the tetragonal structure at room temperature, and the phase transition temperature and the latent heat of ferroelectric to paraelectric are a little less than those of BaTiO3. The peak values of transverse magnetoelectric voltage coefficients for Tb1-xDyxFe2-y- BaTi0.99Mn0.01O3+δ and Tb1-xDyxFe2-y- BaTi0.99Mn0.01O3+δ- Tb1-xDyxFe2-y reach 529.4 mV/A and 1659.5 mV/A under a bias magnetic field of about 33 kA/m, which are 1.48 and 1.45 times of Tb1-xDyx Fe2-y-BaTiO3 and Tb1-xDyxFe2-y- BaTiO3-Tb1-xDyxFe2-y, respectively. The transverse magnetoelectric voltage coefficient of trilayer composites is about three times as large as those for bilayers of the same kind.

引用

页码：146 / 152