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首页> 外文期刊>Journal of materials science >Influence of Zn~(2+) doping towards the structural, magnetic, and dielectric properties of NiFe_2O_4 composite
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Influence of Zn~(2+) doping towards the structural, magnetic, and dielectric properties of NiFe_2O_4 composite

机译：Zn〜（2+）掺杂对NiFe_2O_4复合材料结构，磁性和介电性能的影响

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摘要

The present work is aimed to study the changes in characteristics of nickel ferrites followed by the zinc doping and for that, the nanocrystalline Ni-Zn ferrites (Ni_(1-x)ZnvFe_2O_4: .v = 0, x = 0.2 and x = 0.4) were prepared via sol-gel auto combustion method and by annealing at subsequent temperature. The physical characterization studies of the final composite provided that the lattice structure of Zn~(2+) substituted at Ni sites confirms for the single-phase ferrite with spinel structure got investigated at room temperature (RT) with functional, morphological as well as temperature-dependent magnetic and dielectric properties. The magnetic properties imply that the distribution of cations at the lattice sites suggests that the magnetization is getting increased with a decrease of temperature from RT to lower temperature in a field cooling process and is due to the strong dipolar magnetostatic interactions between the individual magnetic moments, which also affirms that the magnetization decreases with a decrease of Ni concentration. The coercively extracted from isothermal magnetization curves attributed to the single domain nature at RT. Further, the dielectric constant (ε') and dielectric loss (tan 8) are also examined and found to be strongly dependent on the function of frequency and temperature. The change in ε' and tan δ demonstrated that the dispersion due to the Maxwell-Wagner interfacial polarization and is in a good agreement with Koop's theory.
机译：本作本作的旨在研究镍铁氧体的特性变化，然后是锌掺杂，为此，纳米晶体Ni-Zn铁氧体（Ni_（1-x）Znvfe_2O_4：.v = 0，x = 0.2和x = 0.4 ）通过溶胶 - 凝胶自燃方法制备，并在随后的温度下退火。最终复合材料的物理表征研究规定，在Ni位点取代的Zn〜（2+）的晶格结构确认用尖晶石结构在室温（RT）中进行单相铁素体，其具有功能性，形态以及温度 - 依存磁性和介电性能。磁性特性意味着晶格地点的阳离子的分布表明，在现场冷却过程中从RT到较低温度的温度降低，磁化是增加的，并且由于各个磁矩之间的强偏振静磁相互作用是由于各个磁矩之间的强烈散静相互作用。这还确认磁化减小随着Ni浓度的降低而降低。从室温磁化曲线施加到归因于室温磁化曲线，归因于室温性质。此外，还检查介电常数（ε'）和介电损耗（TAN 8），并发现强烈地取决于频率和温度的功能。 ε'和tanδ的变化证明了由于Maxwell-Wagner界面极化引起的分散，并且与Koop的理论吻合良好。

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  • 来源
    《Journal of materials science》 |2020年第19期|16369-16378|共10页
  • 作者

    P. Sivaprakash; S. Divya; R. Parameshwari; C. Saravanan; Suresh Sagadevan; S. Arumugam; S. Esakki Muthu;

  • 作者单位

    Centre for High Pressure Research School of Physics Bharathidasan University Tiruchirappalli 620024 India;

    Department of Physics National Institute of Technology Tiruchirappalli 620015 India;

    Centre for Nanoscience and Nanotechnology Bharathidasan University Tiruchirappalli 620024 India;

    Centre for High Pressure Research School of Physics Bharathidasan University Tiruchirappalli 620024 India;

    Nanotechnology & Catalysis Research Centre University of Malaya 50603 Kuala Lumpur Malaysia;

    Centre for High Pressure Research School of Physics Bharathidasan University Tiruchirappalli 620024 India;

    Centre for High Pressure Research School of Physics Bharathidasan University Tiruchirappalli 620024 India Department of Physics Karpagam Academy of Higher Education. Coimbatore 641021. India;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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