Tl3+掺杂Co0.5Ni0.5Fe2O4尖晶石铁氧体磁电性能的探索研究

Journal of Materials and Physical Sciences Pub Date : 2023-06-28 DOI:10.52131/jmps.2023.0401.0033

T. Ahmad, M. Islam, I. Gul, Mutawara Mahmood Baig, M. Ajmal

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引用次数: 0

摘要

采用溶胶-凝胶法制备了Co0.5Ni0.5Fe2-xTlxO4 (x=0, 0.05, 0.1, 0.15, 0.2)尖晶石铁素体。XRD分析显示为单相尖晶石结构。掺入Tl+3后，晶格常数a从8.223-8.269Å开始增大，这是由于Tl+3的离子半径大于Fe+3。在300K时，由于AB相互作用减弱，质量磁化率从7.46 × 10-3-4.15 × 10-3 cm3/g下降，居里温度从453K降低到408K。电介电常数遵循麦克斯韦-瓦格纳模型和库普理论。随着Tl+3含量的增加和跳变长度的增加，铁氧体在300K时的直流电阻率从1.82x109-9.23x109 -cm增加。Arrhenius图得到的活化能从0.126 ev增加到0.131eV, Tl+3含量增加

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Exploring Study of Magnetic and Electrical Properties of Tl3+ Doped Co0.5Ni0.5Fe2O4 Spinel Ferrites

Co0.5Ni0.5Fe2-xTlxO4 (x=0, 0.05, 0.1, 0.15, and 0.2) spinel ferrites were prepared via the sol-gel technique. The XRD analysis revealed a single-phase spinel structure. The lattice constant ‘a’ increased from 8.223-8.269Å with doping of Tl+3 due to larger ionic radii of Tl+3 than Fe+3 ions. The mass susceptibility at 300K decreased from 7.46 x 10-3-4.15 x 10-3 cm3/g due tothe weakening of AB interactions followed by a decrease in Curie temperature from 453K to 408K. The electrical permittivity follows the Maxwell-Wagner model and Koop’s theory. The dc resistivity of ferrites at 300K increased from 1.82x109-9.23x109 ?-cm with increasing Tl+3 contents due to increased hopping lengths. The activation energy obtained from Arrhenius plots increased from 0.126 to 0.131eV, increasing Tl+3contents

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Journal of Materials and Physical Sciences

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