单晶Ni纳米线阵列的制备与磁性能  

Preparation and Magnetic Properties of Single-crystal Ni Nanowire Arrays

作　　者：于翠艳[1] 于彦龙[2] 孙宏宇[1] 李伟[1] 许涛[1] 张湘义[1] 

机构地区：[1]燕山大学亚稳材料制备技术与科学国家重点实验室,秦皇岛066004 [2]大庆石油学院应用技术学院,秦皇岛066004

出　　处：《高等学校化学学报》2007年第12期2239-2241,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:50525102);河北省自然科学基金(批准号:E2004000233)资助

摘　　要：采用恒电流沉积方法,在多孔阳极氧化铝(AAO)模板中制备出了具有单晶结构的Ni纳米线阵列.采用扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线衍射(XRD)技术对制备的Ni纳米线阵列的形貌及结构进行了表征.利用振动样品磁强计(VSM)对单晶Ni纳米线阵列的磁性能进行了研究.结果表明,单晶镍纳米线阵列的易磁化方向为纳米线轴向,并且与多晶纳米线相比显示出了更高的矫顽力.直径为30nm的纳米线具有较高的矫顽力(8.236×104A/m)和较高的剩磁比(Mr=0.94Ms).Single-crystal Ni nanowire arrays were prepared by employing the porous AAO template by using the electrodeposition technique at a constant current of 2.0 mA/cm^2. The morphology and microstructure of Ni nanowire arrays were studied by SEM, TEM and XRD techniques. The magnetic properties of the single-crystal Ni nanowire arrays were investigated by VSM. The results reveal that the single-crystal Ni nanowire arrays show a perpendicular magnetic anistory and have a preferential magnetic orientation along the wire axis. The magnetic properties of the single-crystal Ni nanowire arrays are better than those of polycrystal nanowire arrays.

关 键 词：AAO模板 Ni纳米线阵列 单晶 磁性能 

分 类 号：O614[理学—无机化学] TG153.4[理学—化学]