Analysis of cerium substitution in Co-Sr based spinel ferrites for high frequency application  

作　　者：Laura Khudaysh Inas A.Ahmed Syeda Rabia Ejaz Sajjad Ahmad Khan Yasir A.Haleem Mohamed M.Ibrahim Mahmood Ali Hafiz Muhammad Tahir Farid Zeinhom M.El-Bahy 

机构地区：[1]Department of Physics,Faculty of Science,Jazan University,Jazan,45142,Saudi Arabia [2]Department of Chemistry,Faculty of Science,King Khalid University,Abha,62224,Saudi Arabia [3]Department of Physics,The Government Sadiq College Women University,Bahawalpur,63100,Pakistan [4]Institute of Physics,Khwaja Fareed University of Engineering and Information Technology,Rahim Yar Khan,64200,Pakistan [5]Department of Chemistry,College of Science,Taif University,P.O.Box 11099,Taif,21944,Saudi Arabia [6]Centre of Excellence in Solid State Physics,University of the Punjab,Lahore,Pakistan [7]Department of Physics,Government College,Taunsa Sharif,32200,Pakistan [8]Department of Chemistry,Faculty of Science,Al-Azhar University,Nasr City,11884,Cairo,Egypt

出　　处：《Journal of Rare Earths》2024年第9期1755-1763,I0005,共10页稀土学报（英文版）

基　　金：the Deanship of Scientific Research at King Khalid University for funding this work through the large group research project under grant number (RGP2/82/44)。

摘　　要：Spinel ferrites exhibit exceptional magnetic properties,making them a distinctive class of magnetic materials.The sol-gel technique was utilized for the synthesis of spinel ferrites with the chemical formula Co_(0.6)Sr_(0.4)Ce_(x)Fe_(2-x)O_(4). Following that,a comprehensive X-ray diffraction analysis unveiled the crystalline cubic structure of the synthesized materials.Through the utilization of the M-H loop approach,the ferromagnetic attributes of ferrites were assessed,and the assimilation of rare earth elements led to substantial enhancements in saturation magnetization,remanence,and coercivity.Spinel ferrites with a high concentration of rare earth elements have improved direct current resistivity and activation energy.The logarithm of a material's resistance increased from 5.29 to 8.12 Ω·cm as cerium is added.With a change in the amount of cerium,the activation energy goes up from 0.19 to 0.29.By changing the frequency from 5.5 to 9.5 GHz,the dielectric characteristics were determined.As the frequency goes up,the dielectric constant goes down.Spinel ferrites that have been made better in every way can be used in high-frequency applications.

关 键 词：Activation energy DC electrical resistance Remanence magnetization Cobalt strontium spinel ferrites High frequency application Rare earths 

分 类 号：TB34[一般工业技术—材料科学与工程]