有序和无序FeAl的磁性能研究(英文)  

A study on the magnetic properties of ordered and disordered FeAl intermetallic

作　　者：范润华[1] 尹文宗[1] 孙康宁[1] 李爱菊[1] 孙家涛[1] 

机构地区：[1]山东大学材料液态结构及其遗传性教育部重点实验室,山东济南250061

出　　处：《功能材料》2005年第9期1451-1454,共4页Journal of Functional Materials

基　　金：Financially supported by the National Natural Science Foundation of China(50242008)

摘　　要：有序-无序转变对FeAl金属间化合物磁性能的影响应当引起重视。许多实验和理论研究表明完全有序的FeAl是无磁的。但是,可以通过非平衡技术使FeAl无序化,如快速凝固、冷加工、溅射、共蒸发和机械合金化。本文利用固体与分子经验电子理论(EET)和Jaccarino-Walker模型对此进行了研究,结果表明,完全无序的FeAl是铁磁性的,每个Fe原子的平均原子磁矩是1.41μB。The effect of order-disorder on magnetic properties of FeAI intermetallic deserves much attention. Many experimental and theoretical studies indicate that perfect ordered FeAI is nonmagnetic. However, the long-range order of ordered FeAl could be destroyed by non-equilibrium techniques, such as rapid quenching, cold-working treatment, sputtering, co-evaporation and mechanical alloying. Based on the empirical electron theory of solid and molecule （EET） and J accarino-Walker model, our calculation predicts that the completely disordered FeAI is ferromagnetic and has the average magnetic moment of 1.41μFB per Fe atom.

关 键 词：磁性能 FEAL 有序-无序 固体与分子经验电子理论(EET) 

分 类 号：TG132.2[一般工业技术—材料科学与工程]