Achieving Ultra-Broad Microwave Absorption Bandwidth Around Millimeter-Wave Atmospheric Window Through an Intentional Manipulation on Multi-Magnetic Resonance Behavior  

作　　者：Chuyang Liu Lu Xu Xueyu Xiang Yujing Zhang Li Zhou Bo Ouyang Fan Wu Dong‑Hyun Kim Guangbin Ji 

机构地区：[1]School of Materials Science and Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,Jiangsu,People’s Republic of China [2]School of Materials Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,People’s Republic of China [3]School of Physics,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,People’s Republic of China [4]School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,Jiangsu,People’s Republic of China [5]School of Physics,Chungbuk National University,Cheongju 28644,South Korea [6]Department of Chemistry,School of Science,Tianjin University,Tianjin 300072,People’s Republic of China

出　　处：《Nano-Micro Letters》2024年第9期291-307,共17页纳微快报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.:52271180,51802155,12304020);National Key R&D Program of China(No.:2021YFB3502500);Natural Science Foundation of Jiangsu Province(BK20230909);Priority Academic Program Development(PAPD)of Jiangsu Higher Education Institutions;the Center for Microscopy and Analysis at Nanjing University of Aeronautics and Astronautics.

摘　　要：The utilization of electromagnetic waves is rapidly advancing into the millimeter-wave frequency range,posing increasingly severe challenges in terms of electromagnetic pollution prevention and radar stealth.However,existing millimeter-wave absorbers are still inadequate in addressing these issues due to their monotonous magnetic resonance pattern.In this work,rare-earth La^(3+)and non-magnetic Zr^(4+)ions are simultaneously incorporated into M-type barium ferrite(BaM)to intentionally manipulate the multi-magnetic resonance behavior.By leveraging the contrary impact of La^(3+)and Zr^(4+)ions on magnetocrystalline anisotropy field,the restrictive relationship between intensity and frequency of the multi-magnetic resonance is successfully eliminated.The magnetic resonance peak-differentiating and imitating results confirm that significant multi-magnetic resonance phenomenon emerges around 35 GHz due to the reinforced exchange coupling effect between Fe^(3+)and Fe^(2+)ions.Additionally,Mosbauer spectra analysis,first-principle calculations,and least square fitting collectively identify that additional La^(3+)doping leads to a profound rearrangement of Zr^(4+)occupation and thus makes the portion of polarization/conduction loss increase gradually.As a consequence,the La^(3+)-Zr^(4+)co-doped BaM achieves an ultra-broad bandwidth of 12.5+GHz covering from 27.5 to 40+GHz,which holds remarkable potential for millimeter-wave absorbers around the atmospheric window of 35 GHz.

关 键 词：Microwave absorption Ultra-broad bandwidth M-type barium ferrite Magnetocrystalline anisotropy field Multimagnetic resonance 

分 类 号：TN015[电子电信—物理电子学]