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在具有纳米级孔洞的多孔氧化铝模板上,用电沉积方法成功地制备出α Fe 纳米线有序阵列组装膜.分别用透射电子显微镜( T E M) 、穆斯堡尔谱仪( M S) 和振动样品磁强计( V M S)对样品进行了测试分析. T E M 和电子衍射的结果显示,阵列中的纳米线均匀有序,彼此独立,由一串α Fe 单晶磁性颗粒构成. V S M 测试结果表明,这种纳米阵列结构具有高度垂直磁各向异性.当外磁场垂直磁化时,磁滞回线具有很高矩形比(098) 和矫顽力(176 ×105 A/ m) .尤其 M S 的测试结果显示,阵列中的每根纳米线的总磁矩都沿其轴线高度取向,垂直于膜面,其饱和磁化强度接近其块材的值(017 T) .
In a porous alumina template with nano-scale holes, an array of α-Fe nanowires ordered arrays was successfully prepared by electrodeposition. The samples were analyzed by transmission electron microscopy (TEM), Mossbauer spectroscopy (M S) and vibrating sample magnetometer (VMS) respectively. The results of T E M and electron diffraction show that the nanowires in the array are uniformly ordered and independent of each other and consist of a series of αFe single crystal magnetic particles. V S M test results show that this nano-array structure has a high degree of perpendicular magnetic anisotropy. When the external magnetic field perpendicular magnetization, the hysteresis loop has a high squareness (098) and coercivity (1 76 × 105 A / m). In particular, M S test results show that the total magnetic moment of each nanowire in the array is highly oriented along its axis, perpendicular to the membrane surface, and its saturation magnetization is close to the value of its bulk (0.17 T).