半金属磁性材料研究进展

Half-metallic ferromagnetic materials

半金属材料是一种新型的功能自旋电子学材料 ,是一种具有特殊能带结构的物质 ,近年来日益受到人们的关注 .半金属材料从微观上具有导体和绝缘体双重性质 :对一种自旋取向的电子其能带结构呈现金属性 ,而另一自旋取向的电子其能带结构呈现绝缘体性 .文章着重对Half -Heusler结构半金属材料、CrO2 铁磁半金属、Fe3 O4亚铁磁材料半金属、反铁磁材料半金属和钙钛矿及双钙钛矿半金属的结构特性进行分析和综述 。

Half-metal magnetic materials are a new kind of spintronics material with a special energy band structure. They exhibit the metallic behavior of majority-spin electrons and the insulating behavior of minority-spin electrons, and are thus attracting more and more attention in recent years. In this paper, the space structure and relevant physical properties of Half-Heusler structure half-metallic ferromagnetic materials, CrO 2 ferromagnetic half metal, Fe 3O 4 sub-ferromagnetic half metal, anti-ferromagnetic half metals, and perovskite and double perovskite half metals are reviewed. The principle and prospects for their applications are also analyzed.