Magneto-Orientated Graphite Double-Layer Homo-Structure with Broadband Microwave Absorption  

作　　者：王俊松 丁伟 张成宏 邱康 高佑琳 陈棉科 Muhammad Adnan Aslam Mahmoud AKhalifa 罗家亮 方军 盛志高 Jun-Song Wang;Wei Ding;Cheng-Hong Zhang;Kang Qiu;You-Lin Gao;Mian-Ke Chen;Muhammad Adnan Aslam;Mahmoud A.Khalifa;Jia-Liang Luo;Jun Fang;Zhi-Gao Sheng(High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China;Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China)

机构地区：[1]High Magnetic Field Laboratory,Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [2]University of Science and Technology of China,Hefei 230026,China [3]Institutes of Physical Science and Information Technology,Anhui University,Hefei 230601,China [4]Institute of Solid State Physics,Chinese Academy of Sciences,Hefei 230031,China

出　　处：《Chinese Physics Letters》2023年第11期149-154,共6页中国物理快报（英文版）

基　　金：supported by the National Key R&D Program of China(Grant No.2021YFA1600203);the National Natural Science Foundation of China(Grant Nos.U2032218,11904116,and 12111530283);the Plan for Major Provincial Science&Technology Project(Grant No.202003a05020018);supported by the High Magnetic Field Laboratory of Anhui Province。

摘　　要：We utilized magnetic fields as an efficient tool to manipulate the orientation and electromagnetic properties of graphite micro-flakes(GMFs).As a result,we successfully developed a GMF double-layer homo-structure,which shows excellent electromagnetic absorption properties.By tuning the direction of a small magnetic field(850 G),vertical and horizontal aligned GMFs are produced.Their electromagnetic parameters are effectively tailored by this magneto-orientation effect,and the vertical and horizontal aligned GMFs achieve good results in terms of impedance matching and microwave absorption.With the combination of these two magneto-orientated layers,vertically oriented as the surficial impedance matching layer and horizontally oriented as the inner loss layer,we design a GMF-based double-layer homo-structure.After thickness optimization,-38.2 d B minimum reflection loss and 6.4 GHz(11.6–18.0 GHz)absorption bandwidth are achieved.Our findings further emphasize the importance of material orientation freedom and provide a magneto-strategy to design multiple-layer structures and to produce high-performance microwave devices.

关 键 词：microwave MATCHING ABSORPTION 

分 类 号：O441[理学—电磁学] TQ127.11[理学—物理]