Co反点阵列薄膜的制备及形貌对其磁性的影响  

Preparation of Co Antidot Arrays and the Effect of Morphology on Magnetic Properties

作　　者：祁洪飞[1] 王锦鹏[1] 刘大博[1] 

机构地区：[1]北京航空材料研究院,北京100095

出　　处：《稀有金属材料与工程》2014年第4期862-865,共4页Rare Metal Materials and Engineering

基　　金：北京航空材料研究院创新基金项目(KF53090315)

摘　　要：采用胶体晶体模板方法，通过变换聚苯乙烯（PS）微球粒径和溅射时间制备了相同厚度的孔径1-5μm的Co反点阵列薄膜。利用扫描电子显微镜（SEM）、原子力显微镜（AFM）、X射线衍射（XRD）和振动样品磁强计（VSM）考察了样品的结构和磁学特性。发现Co反点阵列薄膜的矫顽力和剩磁比最大达到253．18×10-4T和0．85，分别为Co薄膜的3．4和2.3倍，并且随孔径的增大逐渐降低。结合理论分析结果表明，Co反点阵列薄膜本身的形状各向异性是其取得优良磁学性能的原因，孔径和孔间距这两种形状因素造成的形状各向异性的变化是其磁性发生变化的物理本质。Highly ordered Co antidot arrays with different pore diameters （1.0, 2.1, 3.0, 4.1, 5 μm） and the same thickness were prepared via sputtering Co into the gaps of PS colloidal crystal templates with different sputtering time, The structure and magnetic properties of Co antidot arrays were characterized by SEM, AFM, XRD and VSM. It is found that the coercivity and remanence ratio of Co antidot arrays are up to 253.18 X 10-4 T and 0.85, respectively, and they are 3.4 and 2.3 times larger than those of Co films, respectively. Moreover, with the increase of the pore diameter, the coercivity and the remanence ratio decrease gradually. The results of theoretical analysis indicate that the excellent magnetic characteristics come from the shape anisotropies induced by the structure itself, and the change of the shape anisotropies caused by pore diameter and pore spacing results in the change of the magnetic properties

关 键 词：Co反点阵列 聚苯乙烯微球 孔径 磁性 

分 类 号：TB383.2[一般工业技术—材料科学与工程]