Effect of Cr substitution on structural, magnetic and impedance spectroscopic properties of Cd0.5Zn0.5Fe2-xCrxO4 ferrites

被引:54
作者
Hcini, Fakher [1 ,2 ]
Hcini, Sobhi [1 ]
Alzahrani, Bandar [3 ]
Zemni, Sadok [1 ]
Bouazizi, Mohamed Lamjed [3 ]
机构
[1] Univ Monastir, Fac Sci Monastir, Dept Phys, Lab Phys Chem Mat, Monastir 5019, Tunisia
[2] Univ Kairouan, Fac Sci & Technol Sidi Bouzid, Res Unit Valorizat & Optimizat Exploitat Resource, Univ Campus Agr City, Sidi Bouzid 9100, Tunisia
[3] Prince Sattam Bin Abdulaziz Univ, Coll Engn, Al Kharj 11942, Saudi Arabia
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2020年 / 126卷 / 05期
关键词
Ferrites; Solgel method; Microstructural analysis; FTIR; Magnetic properties; Impedance spectroscopic; ELECTRICAL-PROPERTIES; DIELECTRIC-PROPERTIES; CATION DISTRIBUTION; TEMPERATURE-DEPENDENCE; NI; MODULUS;
D O I
10.1007/s00339-020-03544-z
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Cr-substituted Cd-Zn spinel ferrites of different compositions (Cd0.5Zn0.5Fe2-xCrxO4) were prepared using solgel method for x = 0 and 0.5. The XRD analysis and Rietveld refinements indicate that samples crystallize in the cubic Fd3 over bar m spinel structure and the lattice parameters decrease with Cr substitution. Two principal absorption bands related to the stretching vibration of tetrahedral and octahedral sites were shown from FTIR spectra. The spontaneous magnetization, coercivity and remanance were also investigated for the prepared samples. DC conductivity was found to decrease with the substitution of Cr. The studies of imaginary part of permittivity and tangent loss reveal that the prepared materials may be good candidates for some interesting electronics devices. An electrical relaxation phenomenon with non-Debye nature was observed from the variations of imaginary parts of modulus and impedance. The estimated activation energies values from relaxation time and dc-conductivity are very close. Electrical parameters deduced from the Nyquist plots using an equivalent circuit show that the conduction process in the prepared samples is due to the grain boundaries contributions.
引用
收藏
页数:14
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