Role of Rare Earth Metal Ions Doping on Structural, Electrical, Magnetic, and Dielectric Behavior of Spinel Ferrites: a Comparative Study

被引:9
作者
Ikram, Salma [1 ]
Jacob, Jolly [2 ]
Mehboob, Khurram [3 ]
Mahmood, Khalid [1 ]
Amin, N. [1 ]
Arshad, M. I. [1 ]
Ajaz Un Nabi, M. [1 ]
机构
[1] Univ Faisalabad, Govt Coll, Dept Phys, Faisalabad, Pakistan
[2] Abu Dhabi Univ, Coll Arts & Sci, Abu Dhabi, U Arab Emirates
[3] King AbdulAziz Univ KAU, Coll Engn, Dept Nucl Engn, POB 80204, Jeddah 21589, Saudi Arabia
关键词
Spinel ferrites; XRD; SEM; Dielectric studies; Magnetic studies; MN-ZN FERRITES; THERMOELECTRIC PROPERTIES; THERMAL EVAPORATION; SECONDARY PHASES; NANOPARTICLES; ENHANCEMENT; SUBSTITUTION; COFE2O4; SOL;
D O I
10.1007/s10948-020-05688-8
中图分类号
O59 [应用物理学];
学科分类号
摘要
In current studies, we have compared the doping effect of different rare earth metal ions on structural, electrical, magnetic, and dielectric properties in three different series of spinel ferrites. The cubic spinel structure for all the synthesized nanoferrites had been confirmed by XRD scans and further with FTIR analysis. Crystallite size, grain size, and lattice constant are found significantly affected by nature of dopant RE(3+)ions and decrease with decreasing ionic radii of dopants. Lanthanum doping showed appearance of secondary phases at dopant concentration above 0.2 that was attributed to its larger ionic radii than cerium. The magnetic parameters for all the prepared samples were discussed by tracing hysteresis curves of all synthesized samples at room temperature. Decreasing crystallite size effected spin orders which associated with ionic radii of RE(3+)ions resulted in decrease in magnetization. Dopants having smaller ionic radii greatly reduced coercivity and improved initial permeability. In the temperature range 423 to 823 K, the composition-dependent DC resistivity and activation energy ranges between 10(9) to similar to 10(10)Omega cm and similar to 2.85 eV respectively. Both dielectric loss and dielectric constant decrease with decrease in frequency. The reported characteristics made these prepared nanoferrites suitable candidates for high-frequency and microwave absorber devices.
引用
收藏
页码:1833 / 1842
页数:10
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