高等学校化学学报

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单晶Ni纳米线阵列的制备与磁性能

于翠艳1,2, 于彦龙2, 孙宏宇1, 李伟1, 许涛1, 张湘义1   

    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
  • 收稿日期:2007-05-26 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10
  • 通讯作者: 张湘义

Preparation and Magnetic Properties of Single-crystal Ni Nanowire Arrays

YU Cui-Yan1,2, YU Yan-Long2, SUN Hong-Yu1, LI Wei1, XU Tao1, ZHANG Xiang-Yi1*   

    1. State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China;
    2. Department of Applied Technology, Daqing Petroleum Institute, Qinhuangdao 066004, China
  • Received:2007-05-26 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10
  • Contact: ZHANG Xiang-Yi

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30 nm的纳米线具有较高的矫顽力(8.236×104 A/m)和较高的剩磁比(Mr=0.94Ms).

关键词: AAO模板, Ni纳米线阵列, 单晶, 磁性能

Abstract:

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/cm2. 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.

Key words: Anodic aluminum oxides template, Ni nanowire arrays, Single-crystal, Magnetic properties

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