Fe/RE多层膜磁性及其变化机制  

Magnetic Properties and Change Mechanism of Fe/RE(RE: Dy, Y) Multilayers

作　　者：李胜利[1] 王佩璇[2] 马如璋[2] 

机构地区：[1]山东工业大学材料学院,山东济南250061 [2]北京科技大学材料物理系,北京100083

出　　处：《中国稀土学报》2000年第2期116-119,共4页Journal of the Chinese Society of Rare Earths

基　　金：山东省自然科学基金!(Q96F0 414 5 )

摘　　要：研究了Fe/RE多层膜 (Fe单层厚度 <2 0nm)沉积态退火过程中 (温度≥ 473K)的结构与磁性 ,分析了磁性变化的原因。沉积态的Fe单层由分离的Fe岛组成 ,小尺寸的Fe岛呈超顺磁性导致了整个膜显示顺磁性。退火时Fe岛合并长大 ,膜由超顺磁转变为铁磁 ,同时磁化强度和矫顽力增加。Magnetic properties and structure of Fe/RE multilayers(Fe single layer ≤2.0 nm) were examined in as deposited state and during annealing(T≥473 K). The change in magnetic properties was analyzed. The results show that the Fe single layers are composed of insular Fe domains in as deposited state. Superparamagnetic nature of the Fe domains of small size causes the films to behave like paramagnetic properties. During annealing, the growth of Fe domains results in the films transformed from paramagnetic into ferromagnetic and the rise in H c and M s.

关 键 词：稀土 多层膜 结构 铁 RE 铁磁性 铁磁层 磁性 

分 类 号：TM271[一般工业技术—材料科学与工程] O482.52[电气工程—电工理论与新技术]