Tb1-xDyxFe2-y-BaTi0.99Cr0.01O3-δ多层复合结构中的磁电效应
收稿日期: 2008-05-19
修回日期: 2008-08-16
网络出版日期: 2009-03-20
Magnetoelectric Effect in Laminate Composites Tb1-xDyxFe2-y-BaTi0.99Cr0.01O3-δ
Received date: 2008-05-19
Revised date: 2008-08-16
Online published: 2009-03-20
高剑森 , 张 宁 . Tb1-xDyxFe2-y-BaTi0.99Cr0.01O3-δ多层复合结构中的磁电效应[J]. 无机材料学报, 2009 , 24(2) : 367 -370 . DOI: 10.3724/SP.J.1077.2009.00367
Chromiun doped BaTiO3 was synthesized with sol-gel technique. The Cr-doped BaTiO3 was still in the structure of tetragonal perovskite by X-ray diffraction, and its transformation point of ferroelectric to paraelectric as well as the latent heat of the transformation were observed a little less than those of pure BaTiO3, respectively, by the tests of differential scanning calorimetry. Layered composites Tb1-xDyxFe2-y and BaTi1-zCrzO3-δ were fabricated by bonding the discs of the doped BaTiO3 and rare earth alloy Tb1-xDyxFe2-y. The magnetoelectric (ME) effect of the layered samples was investigated. The transverse ME voltage coefficient for the bilayer Tb1-xDyxFe2-y-BaTi1-zCrzO3-δ and the trilayer Tb1-xDyxFe2-y-BaTi1-zCrzO3-δ-Tb1-xDyxFe2-y reach 732.5 and 2753mV/A, respectively, under a bias magnetic field 28kA/m at room temperature, which are about 54% and 56% larger than those for the bilayer and trilayer composed by pure BaTiO3, respectively. Since Cr-doped BaTiO3 does not contain injurants, such as lead and zirconium, it can replace lead zirconium titanite as a “green” piezoelectric material for ME composites.
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