Uniaxial magnetic anisotropy in nanostructured Co/Cu(001): from surface ripples to nanowires.
Uniaxial magnetic anisotropy in nanostructured Co/Cu(001): from surface ripples to nanowires.
复制标题
纳米结构 Co/Cu(001) 中的单轴磁各向异性：从表面波纹到纳米线。
DOI：
10.1103/physrevlett.91.167207
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发表时间：
2003
影响因子：
8.6
通讯作者：
U. Valbusa
中科院分区：
文献类型：
--
作者：
R. Moroni;D. Sekiba;F. Buatier de Mongeot;G. Gonella;C. Boragno;L. Mattera;U. Valbusa
我们研究了Cu（001）衬底上纳米结构Co薄膜的形貌与磁各向异性之间的关系。离子刻蚀形成的纳米尺度波纹对Co薄膜的磁性能有很大的影响。观察到一个表面型单轴磁各向异性，其易磁化轴平行于波纹。磁各向异性的起源已被确定与涟漪形成引起的阶梯分布的修改。在较高的离子剂量下，当Co波纹分离和结晶纳米线形成时，观察到由于静磁贡献而导致的磁各向异性的强烈增强。
We have investigated the correlation between morphology and magnetic anisotropy in nanostructured Co films on Cu(001). The formation of nanoscale ripples by ion erosion is found to deeply affect the magnetic properties of the Co film. A surface-type uniaxial magnetic anisotropy with easy axis parallel to the ripples is observed. The origin of the magnetic anisotropy has been identified with the modification of thermodynamic-step distribution induced by ripple formation. At higher ion doses, when Co ripples detach and crystalline nanowires form, a strong enhancement of the magnetic anisotropy due to magnetostatic contributions is observed.