CoFe_2O_4纳米线阵列的制备与磁性  

Fabrication of CoFe_2O_4 nanowire arrays and its magnetic properties

作　　者：于冬亮[1] 都有为[1] 

机构地区：[1]南京大学固体微结构国家重点实验室江苏省纳米科技重点实验室

出　　处：《功能材料》2006年第8期1210-1212,共3页Journal of Functional Materials

基　　金：国家重点基础研究发展规划资助项目(2005CB623605)

摘　　要：在氧化铝模板的纳米孔洞中,用电化学的方法沉积钴铁合金纳米线,经过550℃、30h氧化处理,成功制备出钴铁氧体纳米线阵列。分别用透射电子显微镜(TEM)、X射线衍射仪(XRD)和振动样品磁场计(VSM)对样品的形貌、晶体结构和磁学性质进行了表征测试。TEM观察结果显示纳米线粗细均匀,直径约为70nm。XRD显示纳米线的物相结构为CoFe2O4;VSM测试结果表明,CoFe2O4纳米线阵列的磁滞回线矫顽力为1.190×105A/m,比氧化处理前的钴铁合金纳米线阵列有显著提高。Arrays of CoFe2O4 nanowires were prepared by using porous anodic aluminum oxide（AAO） membrane as the template. For the preparation of the ferrite nanowires, Co-Fe alloy nanowires were electrodeposited into the pores of the AAO membranes. The atomic ratio is about Co ： Fe = 1 ： 2 which can be detected by energy dispersive spectrum. X-ray diffraction study showed pure phase of CoFe2O4 after anodization. TEM studies showed the diameters of the nanowires are about 70nm. The vibrating sample magnetometer measurement reveals that the coercivity of the CoFe2O4 nanowire arrays is 1. 190× 10^5A/m, it is much higher than that of alloy nanowire arrays.

关 键 词：纳米线 COFE2O4 矫顽力 

分 类 号：O488[理学—固体物理] O482.52[理学—物理]