Magnetic moment distributions in α- Fe nanowire array
Magnetic moment distributions in α- Fe nanowire array
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DOI：
10.1360/03yb9013
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发表时间：
2003-01
期刊：
影响因子：
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通讯作者：
Fashen Li;Liyuan Ren;Z. Niu;Haixin Wang;Tao Wang
中科院分区：
文献类型：
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作者：
Fashen Li;Liyuan Ren;Z. Niu;Haixin Wang;Tao Wang
α-Fe纳米线阵列已被电沉积到阳极氧化铝模板中。利用透射穆斯堡尔谱(MS)、转换电子穆斯堡尔谱(CEMS)和微磁模拟研究了直径60 nm的α-Fe纳米线内部和末端附近的磁矩分布。透射穆斯堡尔谱（MS）显示，α-Fe纳米线阵列内部的磁矩与纳米线完全平行，而转换电子穆斯堡尔谱（CEMS）显示，纳米线末端附近的磁矩从纳米线的长轴发散，通过2,5峰强度比计算出的平均发散角约为24.0°。此外，利用微磁模拟计算了到纳米线顶部不同深度的磁矩分布，表明内部磁矩严格平行于纳米线，且磁矩越接近纳米线顶部，发散角越大。磁测量表明，该α-Fe纳米线阵列表现出很强的磁各向异性。
α-Fe nanowire array has been electrodeposited into anodic aluminum oxide template. The magnetic moment distributions, in the interior and near the extremities of α-Fe nanowire with 60 nm in diameter, have been studied by means of transmission Mossbauer spectroscopy (MS), conversion electron Mossbauer spectroscopy (CEMS) and micromagnetic simulation. Transmission Mossbauer spectrum (MS) shows that the magnetic moments, inside the α-Fe nanowire array, are well parallel to nanowire, while conversion electron Mossbauer spectrum (CEMS) reveals that the magnetic moments, near the extremities of nanowire, diverge from the long axis of wire, and the average diverging angle calculated by the intensity ratio of the 2,5 peaks is about 24.0°. Moreover, the magnetic moment distributions of different depths to the top of wire are counted using micromagnetic simulation, which indicates that, the interior magnetic moments are strictly parallel to nanowire, and the closer the magnetic moment to the top of wire, the larger the diverging angle. Magnetic measurement shows that this α-Fe nanowire array represents a strong magnetic anisotropy.