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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
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
关键词
AAO模板
Ni纳米线阵列
单晶
磁性能
Anodic aluminum oxides template
Ni nanowire arrays
Single-crystal
Magnetic properties
