钽中间层在增强 Fe3O4 薄膜性能方面的作用。

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Beilstein Journal of Nanotechnology Pub Date : 2024-10-14 eCollection Date: 2024-01-01 DOI:10.3762/bjnano.15.101
Hai Dang Ngo, Vo Doan Thanh Truong, Van Qui Le, Hoai Phuong Pham, Thi Kim Hang Pham
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引用次数: 0

摘要

室温下 Fe3O4 的高自旋极化和低电阻率一直是自旋电子学中一个吸引人的话题,其应用前景十分广阔。要实现这些目标,高质量的 Fe3O4 薄膜是必不可少的。本报告采用射频溅射法在室温下制备了不同基底(SiO2/Si(100)、MgO(100)和 MgO/Ta/SiO2/Si(100))上的 Fe3O4 薄膜,并在 450 °C 下退火 2 小时。在 MgO/Ta/SiO2/Si(100) 上生长的多晶 Fe3O4 薄膜呈现出非常有趣的形态和结构特征。更重要的是,与没有缓冲层或只有一个缓冲层的情况相比,由于氧化镁/Ta 缓冲层的影响而导致的晶粒大小和结构变化对 Fe3O4 薄膜的饱和磁化和矫顽力有很大影响。
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The role of a tantalum interlayer in enhancing the properties of Fe3O4 thin films.

High spin polarization and low resistivity of Fe3O4 at room temperature have been an appealing topic in spintronics with various promising applications. High-quality Fe3O4 thin films are a must to achieve the goals. In this report, Fe3O4 films on different substrates (SiO2/Si(100), MgO(100), and MgO/Ta/SiO2/Si(100)) were fabricated at room temperature with radio-frequency (RF) sputtering and annealed at 450 °C for 2 h. The morphological, structural, and magnetic properties of the deposited samples were characterized with atomic force microscopy, X-ray diffractometry, and vibrating sample magnetometry. The polycrystalline Fe3O4 film grown on MgO/Ta/SiO2/Si(100) presented very interesting morphology and structure characteristics. More importantly, changes in grain size and structure due to the effect of the MgO/Ta buffering layers have a strong impact on saturation magnetization and coercivity of Fe3O4 thin films compared to cases of no or just a single buffering layer.

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来源期刊
Beilstein Journal of Nanotechnology
Beilstein Journal of Nanotechnology NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
5.70
自引率
3.20%
发文量
109
审稿时长
2 months
期刊介绍: The Beilstein Journal of Nanotechnology is an international, peer-reviewed, Open Access journal. It provides a unique platform for rapid publication without any charges (free for author and reader) – Platinum Open Access. The content is freely accessible 365 days a year to any user worldwide. Articles are available online immediately upon publication and are publicly archived in all major repositories. In addition, it provides a platform for publishing thematic issues (theme-based collections of articles) on topical issues in nanoscience and nanotechnology. The journal is published and completely funded by the Beilstein-Institut, a non-profit foundation located in Frankfurt am Main, Germany. The editor-in-chief is Professor Thomas Schimmel – Karlsruhe Institute of Technology. He is supported by more than 20 associate editors who are responsible for a particular subject area within the scope of the journal.
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