Magnetic structure of periodically meandered one-dimensional Fe nanowires
Magnetic structure of periodically meandered one-dimensional Fe nanowires
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DOI：
10.1103/physrevb.78.115428
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发表时间：
2008-09
影响因子：
3.7
通讯作者：
S. Shiraki;H. Fujisawa;Tetsuya Nakamura;T. Muro;M. Nantoh;M. Kawai
中科院分区：
文献类型：
--
作者：
S. Shiraki;H. Fujisawa;Tetsuya Nakamura;T. Muro;M. Nantoh;M. Kawai
利用X射线磁性圆二色性研究了垂直磁化的Fe纳米线在Au（788）衬底上的磁性结构。纳米线中的铁磁畴的平均尺寸随温度呈指数下降，导致与Fe的纳米岛相比，磁化强度的衰减更陡。磁化强度和畴结构的温度依赖性可以很好地描述在局部原子几何形状，纳米线中的原子链的数量，相邻自旋之间的交换耦合，和磁各向异性。的非线性覆盖范围的激活能的依赖性的磁畴的创建可以解释的纳米线的整体形状，这也意味着磁开关过程是强烈的形状依赖于在纳米尺度。
We study the magnetic structure of perpendicularly magnetized Fe nanowires grown on Au(788) by means of x-ray magnetic circular dichroism. The average size of ferromagnetic domains in the nanowires exponentially decreases with temperature, leading to a steeper decay in magnetization compared to nanoislands of Fe. The temperature dependence of magnetization and domain structures can be well described in terms of local atomic geometry, the number of atomic chains in nanowires, exchange coupling between adjacent spins, and magnetic anisotropy. The nonlinear coverage dependence of the activation energy for the creation of magnetic domains can be explained by overall shape of nanowires, which also implies that the magnetic switching processes are strongly shape dependent at the nanoscale.