Magnetic and microwave absorption properties of Ni_(1-x)Zn_xFe_2O_4 nanocrystalline synthesized by sol-gel method  

作　　者：ZHANG Min LIU QiangChun ZI ZhenFa DAI YuQiang ZHU XueBin SUN YuPing DAI JianMing 

机构地区：[1]Key Laboratory of Materials Physics,Institute of Solid State Physics,Chinese Academy of Sciences [2]School of Physics and Electronics Information,Huaibei Normal University

出　　处：《Science China(Technological Sciences)》2013年第1期13-19,共7页中国科学（技术科学英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos.10874051,51002156,and 11104098);the Natural Science Major Foundation of Anhui Provincial Higher Education Institutions of China (Grant No. KJ2012ZD14)

摘　　要：Ni1-xZnxFe2O4(0≤x≤1,in steps of 0.1) nanocrystallines were synthesized by sol-gel route.The doping effects of zinc on structural,magnetic and microwave absorption properties were investigated in detail.X-ray diffraction(XRD) results show that all the samples are single-phase spinel structure.The magnetic and microwave absorption properties are strongly dependent on the zinc content,which can be understood in terms of the cations redistribution in spinel tetrahedral and octahedral sites with the increase of zinc content.The magnetic measurement shows the antiferromagnetic nature of the samples for x=0.9 and x=1.0.The saturation magnetization reaches the maximum of 3.35μB/f.u.at x=0.5.The optimal reflection loss(RL) of-29.6 dB is found at 6.5 GHz for an absorber thickness of 5 mm.The RL values exceeding 10 dB are obtained for the absorber in the range of 3.9-8.9 GHz.These Ni1-xZnxFe2O4 nanocrystallines may be attractive candidates for electromagnetic wave absorption materials.

关 键 词：Ni-Zn ferrite magnetic measurement microwave absorption properties 

分 类 号：TB383.1[一般工业技术—材料科学与工程]