Room-temperature dipole ferromagnetism in linear-self-assembling mesoscopic Fe particle arrays
Room-temperature dipole ferromagnetism in linear-self-assembling mesoscopic Fe particle arrays
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DOI：
10.1103/physrevb.56.r8499
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发表时间：
1997-10-01
影响因子：
3.7
通讯作者：
Scheinfein, MR
中科院分区：
文献类型：
--
作者：
Sugawara, A;Scheinfein, MR
通过在规则刻面的 NaCl (110) 表面上自组织阴影生长制备了准一维、纳米直径的 Fe 颗粒阵列。对于半径大于 2.5 nm 的 Fe 颗粒线性阵列，观察到室温偶极子铁磁相。表面磁光克尔磁化曲线表明易轴沿颗粒行排列。剩磁和矫顽力是颗粒直径和线性岛密度的强函数。将实验结果与蒙特卡罗微磁学计算进行比较，后者在没有自由参数的情况下再现了实验观察结果。
Quasi-one-dimensional, nanometer-diameter Fe particle arrays have been prepared by self-organized shadow growth on regularly faceted NaCl (110) surfaces. A room-temperature dipole-ferromagnetic phase was observed for Linear arrays of Fe particles with radii larger than 2.5 nm. Surface magneto-optic Kerr magnetization curves indicate easy-axis alignment along the rows of particles. Remanence and coercivity were strong functions of particle diameter and linear island density. Experimental results are compared with Monte Carlo micromagnetics calculations, which, with no free parameters, reproduce the experimental observations.