Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition
Monocrystalline hexagonal-close-packed and polycrystalline face-centered-cubic Co nanowire arrays fabricated by pulse dc electrodeposition
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DOI：
10.1063/1.2464193
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发表时间：
2007-03
影响因子：
3.2
通讯作者：
Jun Zhang;G. Jones;T. Shen;S. Donnelly;Guanghai Li
中科院分区：
文献类型：
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作者：
Jun Zhang;G. Jones;T. Shen;S. Donnelly;Guanghai Li
通过使用脉冲直流电沉积技术，钴纳米线阵列已生长在阳极氧化铝模板上。我们证明可以通过施加不同的脉冲频率来控制晶体结构、晶粒尺寸和相关的磁性能。对于 25Hz 的脉冲频率，单晶六方密堆积 Co 纳米线沿线长度形成具有明确定义的 [101´0] 生长轴。在 1000Hz 的较高脉冲频率下，面心立方钴纳米线沉积时具有小晶粒尺寸和沿线长度方向的优选[111]织构。讨论了观察到的生长特征的可能机制。对相应磁性能的研究表明，面心立方钴纳米线阵列具有较大的矫顽力和方形度值：探讨了这种行为的原因。
Cobalt nanowire arrays have been grown onto anodic aluminum oxide templates by using a pulse dc electrodeposition technique. We demonstrate that the crystal structure, grain size, and related magnetic properties can be controlled by applying different pulse frequencies. For a pulse frequency of 25Hz, monocrystalline hexagonal-close-packed Co nanowires are formed with a well defined [101¯0] growth axis along the wire length. At a higher pulse frequency of 1000Hz, face-centered-cubic Co nanowires are deposited with a small grain size and a preferred [111] texture directed along the length of the wire. Possible mechanisms for the observed growth characterization are discussed. An investigation of the corresponding magnetic properties indicates that the fcc Co nanowire arrays have the larger coercivity and squareness values: reasons for this behavior are explored.