تقرير
Comparison of h-BN and graphene layers as grain boundary materials for granular FePt-$\text{L}1_0$ thin films
| العنوان: | Comparison of h-BN and graphene layers as grain boundary materials for granular FePt-$\text{L}1_0$ thin films |
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| المؤلفون: | Varaprasad, B. S. D. Ch. S., Xu, Chengchao, Reese, Brandon, Laughlin, David E., Jian-Gang, Zhu |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Applied Physics |
| الوصف: | Granular $\text{L}1_0$-FePt thin films with small columnar grains are essential for heat-assisted magnetic recording media. While hexagonal boron nitride(h-BN) has proven effective for promoting columnar FePt grains, we explored multilayer graphene as an alternative grain boundary material leveraging its structural similarity to h-BN. The FePt granular thin films with carbon-based grain boundary materials(GBMs) were deposited by cosputtering on Si/SiO2 substrates with substrate bias at 650{\deg}C. The RF bias and high temperature facilitated formation of interlinked graphene nanoribbons wrapping around FePt grains, yielding 7.5 nm diameter, 8 nm height grains with an order parameter of 0.78 and a perpendicular coercivity of 40 kOe. However, the formation of graphene nanoribbons could not effectively promote columnar structures, likely due to co-existing amorphous carbon in grain boundaries. Optimizing deposition to improve graphene grain boundary quality is necessary to realize this 2D material's potential for achieving desirable microstructures for HAMR media. Comment: 13 pages, 5 figures, first presented in MMM 2023 conference at Dallas |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2404.14290 |
| رقم الأكسشن: | edsarx.2404.14290 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |