Characterization of Electrodeposited Co-Pt Nanodot Array at Initial Deposition Stage
Characterization of Electrodeposited Co-Pt Nanodot Array at Initial Deposition Stage
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电沉积 Co-Pt 纳米点阵列在初始沉积阶段的表征
DOI：
10.1149/06445.0099ecst
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
T. Homma
中科院分区：
文献类型：
--
作者：
S. Wodarz;T. Otani;H. Hagiwara;T. Homma
我们利用电化学方法制备了Co-Pt纳米点阵列，并将其应用于比特模式介质（BPM），这是未来记录介质的关键技术。由于形成均匀的纳米点阵列是需要的BPM，控制初始阶段的电沉积是重要的。在这项工作中，我们分析了施加电位和纳米图案尺寸对Co-Pt电沉积初始阶段的影响。结果表明，在较小的纳米孔中，Co-Pt核的数量减少。特别是在直径为10 nm的纳米孔中，可以在低过电位条件下形成具有高而均匀矫顽力的Co-Pt单晶粒。随着过电位的降低，Co-Pt薄膜的矫顽力在初始阶段增加，这是因为Co-Pt随高取向的Ru底层成核生长。这些结果表明，可以通过控制Co-Pt的成核和生长行为来优化Co-Pt纳米点阵列的磁性能。
We have fabricated Co-Pt nanodot arrays by electrochemical process for the application of bit patterned media (BPM), which is proposed as a key technology for future recording media. Since formation of uniform nanodot arrays is required for BPM, controlling the initial stages of electrodeposition is significant. In this work, we analyzed the effects of applied potential and size of nano-patterns on initial stages of Co-Pt electrodeposition. As a result, number of Co-Pt nuclei decreased in smaller nano-pore. In particular, formation of Co-Pt single grains, which exhibit high and uniform coercivity, was expected with low overpotential in nanopore with 10 nm diameter. Furthermore, coercivities of Co-Pt films at the initial stage increased with lower overpotential, since Co-Pt nucleated and grew along with Ru underlayer with high orientation. These results indicate that magnetic properties of Co-Pt nanodot arrays can be optimized by controlling the nucleation and growth behavior of Co-Pt.