Synthesis and magnetic properties of nanocolumnar nickel films deposited in argon-nitrogen atmosphere
Synthesis and magnetic properties of nanocolumnar nickel films deposited in argon-nitrogen atmosphere
复制标题
氩氮气氛沉积纳米柱状镍薄膜的合成及磁性能
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
V. Burkhovetskii
中科院分区：
文献类型：
--
作者：
A. Linnik;A. Prudnikov;R. Shalaev;V. Varyukhin;S. Kostyrya;V. Burkhovetskii
在氮气体积分数为2%的Ar气氛中，通过磁控溅射镍靶，获得了具有垂直于衬底生长的纳米柱结构的铁磁性镍膜。X射线衍射测量和磁性研究表明，所获得的薄膜由氮在镍中的固溶体组成。薄膜的饱和磁化强度比纯镍的相应值小1.5-2倍，居里温度低30K。薄膜材料表现出尺寸效应：当颗粒尺寸减小到10 nm以下时，磁化强度急剧下降；当颗粒尺寸为0.5 nm时，薄膜没有磁性有序。
Ferromagnetic nickel films with a structure comprising nanocolumns grown perpendicular to a substrate have been obtained by magnetron sputtering of a nickel target in argon atmosphere containing 2 vol % nitrogen. Measurements of X-ray diffraction and investigation of magnetic properties showed that the obtained films consist of a solid solution of nitrogen in nickel. The saturation magnetization of the films is 1.5–2 times smaller and their Curie temperature is 30 K lower than the corresponding values for pure nickel. The film material exhibits a dimensional effect: as the grain size decreases below 10 nm, the magnetization sharply drops; at a grain size of 0.5 nm, the film possesses no magnetic order.