Structure and magnetic properties of the oxide layers on iron ultrafine particles
Structure and magnetic properties of the oxide layers on iron ultrafine particles
复制标题
铁超细颗粒氧化层的结构和磁性能
DOI：
10.1007/s003390050505
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
Zushu Hu
中科院分区：
文献类型：
--
作者：
Xiaochong Zhao;B. Liu;Y. Liang;Zushu Hu
5. The γ-Fe particles, because of their paramagnetic nature, are very convenient for investigation on the attributes of iron oxide layers formed on the particle surfaces. Structures, morphologies and magnetic properties of the oxide layers covering the iron ultrafine particles have been studied using transmission electron microscopy observation, magnetic property measurement, X-ray diffraction and annealing treatment. Convincing evidences established that the iron oxide layers are not continuous and consist of very fine crystallites, and that these layers are non-ferromagnetic and have no contribution to the saturation magnetization of the iron particles. The iron oxide layers formed at room temperature was determined to be Fe3O4. Additionally, a brief annealing of the iron particles in air were performed to examine magnetic properties of the formed iron oxide layers and ultrafine oxide particles.
