Effect of thulium substitution on conductivity and dielectric belongings of nanospinel cobalt ferrite

作     者：B.Unal M.A Almessiere A.Demir Korkmaz Y.Slimani A.Baykale B. ünal;M.A. Almessiere;A. Demir Korkmaz;Y. Slimani;A. Baykal

作者机构：Institute of Forensic Sciences and Legal MedicineIstanbul University-CerrahpasaBuyukcekmece CampusAlkent 2000BuyukcekmeceIstanbul 34500Turkey Department of Biophysics.Institute for Research&Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441DammamSaudi Arabia Department of PhysicsCollege of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 198231441DammamSaudi Arabia Department of ChemistryIstanbul Medeniyet University34700 IstanbulUskudarTurkey Department of Nano-Medicine ResearchInstitute for Research&Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia 

出 版 物：《Journal of Rare Earths》 (稀土学报（英文版）)

年 卷 期：2020年第38卷第10期

页      面：1103-1113,I0003页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：The Institute for Research and Medical Consultations of Imam Abdulrahman Bin Faisal University (Saudi Arabia) is highly acknowledged for providing the supports through the Projects application No.2019-IRMC-S-1 

主　　题：Spinel ferrites Dielectric properties Conductivity CoFe2O4 Tm3+substitution Rare earths 

摘      要：The CoTmx Fe2-x O4(x≤0.1) NPs were synthesized sonochemically.X-ray powder diffraction patterns and TEM images of the samples prove their chemical purity and cubic structure-morphology,*** substitution ratio of thulium ions to cobalt ferrites have an important effect on the characteristic evaluation of both electrical and dielectric characteristic measured at frequencies up to 3.0 MHz between room temperature and 120℃.Since the thulium substitution has a very strong effect on the characteristic evaluation of both electrical and dielectric properties of cobalt-ferrite samples,four substitutio nal ranges-none,small,medium and high were determined for the interpretation of contribution of thulium ratio to ac/dc conductivity,dielectric constant,dielectric loss and tangent *** increases with the incremental frequencies,in general depending on a variety of tendencies of both temperature and substitutional Tm ratios while the activation energy varies with a high dependency to the regional level of Tm substitution in Co-ferrites *** Arrhenius graph appears to provide us with a single activation energy much higher than 400 meV for x=0.02,which can be attributed to electron hopping mechanisms,apart from other substituted spinel ferrites.