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Effect of annealing on the magnetic states of FEBID‐grown cobalt nanopatterns examined by off‐axis electron holography
Journal of Microscopy ( IF 2 ) Pub Date : 2020-02-06 , DOI: 10.1111/jmi.12869
T Almeida 1 , D McGrouther 1 , A KovÁcs 2 , R Dunin-Borkowski 2 , S McVitie 1
Affiliation  

The growth of cobalt nanopatterns (NPs) using focused electron-beam induced deposition (FEBID) for localised magnetic studies is presented. The initial FEBID products are shown to be polycrystalline and form hetero-structured core-shell NPs through surface oxidation. Off-axis electron holography is performed to reconstruct their morphology, thickness profile and image their individual magnetic vortex domain states. In-situ annealing to 400°C promoted migration of the Co-overspray to grow the Co NPs and improved their crystallinity through coarsening, as well as induced diffusion of embedded carbon out of their surface. It is found that the change in their morphology and chemical instability under heating restricts their suitability for examining thermally induced magnetic variations. This article is protected by copyright. All rights reserved.

中文翻译:

通过离轴电子全息术检测退火对 FEBID 生长的钴纳米图案磁态的影响

介绍了使用聚焦电子束诱导沉积 (FEBID) 进行局部磁性研究的钴纳米图案 (NPs) 的生长。最初的 FEBID 产品显示为多晶,并通过表面氧化形成异质结构的核壳 NP。执行离轴电子全息术以重建它们的形态、厚度轮廓并成像它们各自的磁涡畴状态。原位退火至 400°C 促进了 Co-overspra​​y 的迁移以生长 Co NPs,并通过粗化提高它们的结晶度,以及诱导嵌入的碳从其表面扩散。发现它们在加热下的形态变化和化学不稳定性限制了它们用于检查热感应磁变化的适用性。本文受版权保护。版权所有。
更新日期:2020-02-06
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