摘要
用溶胶-凝胶法制备了Fe掺杂BaTiO3粉体,在1350℃下烧结成圆片状多晶样品,并与Tb1-xDyxFe2-y胶合成磁电(ME)双层膜或三层膜.实验分析表明Fe:BaTiO3依然是四方相钙钛矿结构,但是居里温度及相变潜热均略低于纯净BaTiO3.研究了Tb1-xDyxFe2-y-Fe∶BaTiO3双层膜和Tb1-xDyxFe2-y-Fe∶BaTiO3-Tb1-xDyxFe2-y三层膜的ME效应.在2.8×104A/m的磁场下,两者的横向ME电压系数均达其峰值,分别为6.225和26.25mV·(A·m-1)-1·cm-1.并且,用掺杂BaTiO3制备的双层膜和三层膜的横向ME电压系数均为相同条件下用纯净BaTiO3制备的双层膜和三层膜的横向ME电压系数的1.5倍.另外由于不含铅,锆等有害物质,符合环保要求,因此采用掺杂BaTiO3制备的磁电效应器件具有深入研究和应用价值.
Fe-doped BaTiO3 has been synthesized with sol-gel technique. The doped perovskite was found to have tetragonal structure. The transformation point of ferroelectric to paraelectric and the latent heat of the transformation were observed to be a little less than those for pure BaTiO3. Layered composites Tb1-x Dyx Fe2- y/Fe: BaTiO3 have been fabricated. Their mgnetoelectric (ME) effect has been investigated. The transverse ME voltage coefficient for the bilayer Tb1-xDyx Fe2-y-Fe : BaTiO3 and the trilayer Tb1-x Dyx Fe2-y-Fe: BaTiO3-Tb1-x Dyx Fe2-y can reach 6. 225 adn 26.25 mV·(A· m^-1 )^-1· cm^- 1 , respectively, under a bias magnetic field of 2.8 × 10^4 A/m at room temperature, which are about 50 % larger than those for the bilayer and trilayer composed of pure BaTiO3 .
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第10期6056-6060,共5页
Acta Physica Sinica
基金
国家自然科学基金(批准号:10674071
20473038)
江苏省高技术项目基金(批准号:BG-2005041)资助的课题~~
关键词
ME效应
压电效应
稀土磁性合金
magnetoelectrie effect, piezoelectric material, rear earth ferromagnetic alloy