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在氧化铝模板的纳米孔洞中 ,用电化学的方法沉积铁镍合金纳米线 ,经过 5 5 0℃ 30h氧化处理 ,成功制备出NiFe2 O4 纳米线阵列 .分别用扫描电子显微镜 (SEM)、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 .SEM和TEM观察结果显示氧化铝模板的孔洞分布均匀 ,孔心距约为 110nm ;纳米线的直径约为 70nm .XRD显示纳米线阵列的物相结构为NiFe2 O4 ;VSM测试结果表明 ,NiFe2 O4 纳米线阵列膜的易磁化方向垂直于膜面 .当垂直磁化时磁滞回线的矩形比约为 0 5 ,矫顽力为 4 1×10 3A m ,比氧化处理前的铁镍合金纳米线阵列都有显著提高 .
NiFe 2 O 4 nanowire arrays were successfully prepared by depositing Fe-Ni alloy nanowires electrochemically in the nanoholes of the alumina template by oxidation treatment at 550 ℃ for 30h, respectively. Scanning electron microscopy (SEM), transmission electron The morphology, crystal structure and magnetic properties of the samples were characterized by TEM, XRD and VSM.The SEM and TEM observations showed that the pores of the alumina template were evenly distributed , The center distance of the hole is about 110nm, the diameter of the nanowire is about 70nm, the phase structure of the nanowire array is NiFe2O4 by XRD, and the magnetization direction of the NiFe2O4 nanowire array film is perpendicular to the film surface. The perpendicularity magnetization hysteresis loop has a square ratio of about 0 5 and a coercive force of 4 1 × 10 3A m, which is significantly higher than that of the iron-nickel alloy nanowire arrays before oxidation.