摘要
采用二步阳极氧化法制备孔结构高度有序的多孔氧化铝(AAO)模板。在不同Fe2+/Co2+摩尔比的电解液中,利用交流电化学沉积,在模板孔内成功制备了FeCo合金纳米线阵列。分别采用透射电子显微镜(TEM),场发射扫描电子显微镜(FE-SEM),X射线衍射仪(XRD)和震动样品磁强计(VSM)对样品的形貌,结构及磁学性能进行了表征。结果表明,制备的FeCo合金纳米线排列有序,粗细均匀;其直径与模板孔径一致,填充率较高,且具有明显的[110]择优取向。VSM测试结果表明,不同溶液浓度下制备的FeCo合金纳米线阵列均具有良好的垂直磁各向异性,易磁化轴沿着纳米线轴线方向。随着电解液Fe2+/Co2+摩尔比的不同,可在一定范围内对FeCo合金纳米线阵列的磁性进行调控,并对其原因进行了讨论。
Anodic aluminum oxide（AAO） membranes with highly ordered pores were prepared by secondary anodic oxidation.By using alternating current（AC） electrochemical deposition,FeCo alloy nanowire arrays were fabricated in anodic aluminum oxide（AAO） membranes in different electrolytes with variable molar ratios of Fe2＋/Co2＋.The morphology,microstructure and magnetic properties of FeCo alloy nanowires were characterized by TEM,FE-SEM,XRD and VSM,respectively.The results indicate the FeCo nanowire arrays are uniform and regular,which corresponds to the diameter of the nanochannel of the AAO membrane,and the degree of pore filling rate is very high throughout the template.XRD and TEM results show that the crystal structure of FeCo alloy nanowires has preferred orientation.VSM results show the FeCo nanowire arrays fabricated in different electrolytes has a strong perpenticular magnetic anisotropy,whose easy axis was parallel to the nanowires.The magnetic properties of FeCo nanowire arrays changed with their compositions,and the variation of coercivity and squareness of all samples was discussed in detail.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2012年第3期79-82,88,共5页
Journal of Materials Engineering
基金
武汉市青年科技晨光计划资助项目(20065004116-35)
关键词
多孔氧化铝模板
电化学沉积
FeCo合金纳米线阵列
磁各向异性
porous anodic aluminum oxide template
electrochemical deposition
FeCo alloy nanowire arrays
magnetic anisotropy
