自旋电子学
磁性
材料科学
磁铁
化学气相沉积
纳米技术
自旋(空气动力学)
凝聚态物理
纳米晶
磁力显微镜
化学物理
作者
Zijing Zhao,Jiadong Zhou,Liang Liu,Nanshu Liu,Jianqi Huang,Biao Zhang,Wenjie Li,Yi Zeng,Tong Zhang,Wei Ji,Teng Yang,Zhengwei Zhang,Song-Lin Li,Xiao-Dong Zhu
出处
期刊:Nano Letters
[American Chemical Society]
日期:2022-01-21
标识
DOI:10.1021/acs.nanolett.1c04403
摘要
Two-dimensional (2D) magnetic materials have attracted significant attention for promising applications in energy-saving logic and robust memory devices. However, most 2D magnets discovered so far typically feature drawbacks for practical applications due to low critical temperatures. Herein, we synthesize ultrathin room-temperature (RT) magnetic Fe7Se8 nanoflakes via the space-confined chemical vapor deposition method. It is found that the appropriate supply and control of Se concentration in the reaction chamber is crucial for synthesizing high-quality nonstoichiometric Fe7Se8 nanoflakes. Cryogenic electrical and magnetic characterizations reveal the emergence of spin reorientation at ∼130 K and the survival of long-range magnetic ordering up to room temperature. The RT magnetic domain structures with different thicknesses are also uncovered by magnetic force microscopy. Moreover, theoretical calculations confirm the spin configuration and metallic band structure. The outstanding characteristics exhibited by Fe7Se8 nanoflakes, including RT magnetism, spin reorientation property, and good electrical conductivity, make them a potential candidate for RT spintronics.
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