室温磁电材料的制备与性能  

Fabrication and Properties of Magnetoelectric Materials Applied at Room Temperature

作　　者：徐任信[1] 王钧[1] 周静[1] 杨小利[1] 

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070

出　　处：《材料导报》2008年第7期8-13,共6页Materials Reports

基　　金：国家自然科学基金(50402014);湖北省自然科学基金(2007ABA028)

摘　　要：室温下具有磁电性能的多铁性材料是近年来研究的热点,分析了室温铁磁电单相材料和复合材料的制备方法及其性能,特别是外延生长、二次烧结和无机/有机复合技术分别对单相铁磁电薄膜、颗粒弥散型以及层状铁磁电复合材料结构与性能的影响。结果表明,通过诱导晶格变形、消除体系杂相,能获得具有强室温磁电性能的单相磁电材料。通过提高磁性颗粒在复合材料中的分散程度,可以明显增强弥散型磁电复合材料的磁电性能。将磁性和铁电材料进行层状复合,选择合适的外场耦合模式,得到了高磁电耦合系数的复合材料。The study on the multiferroic materials which show the magnetoelectric properties at room temperature is the hotspot in recent years. The fabrications and properties of the magnetoelectric single-phase materials and composites applied at room temperature are analyzed in this article. The influence of epitaxy technique on the structure and properties of magnetoelectric single-phase thin film, as well as that of second-sintering and inorganic/organic com- pound techniques on the ones of the particular dispered and the laminate magnetoelectric composites, respectively, is emphasized. The results show that the single-phase materials with strong magnetoelectric properties at room tempera- ture are obtained by the inducing deformation of crystal lattice and the elimination of impurity. The magnetoelectric properties of particular dispered composites can be enhanced by improving the dipersion degree of the magnetic grains in composites. The laminate composites with magnetic and ferroelectric pieces show the high magnetoelectric coupling co- efficients at the appropriate coupling model of applied field.

关 键 词：磁电效应铁磁铁电单相薄膜复合材料 

分 类 号：TB30[一般工业技术—材料科学与工程] O48[理学—固体物理]