Abstract Li - Ni Fe 2 O 4 NPs have been prepared by a simple chemical co-precipitation method. The structural analysis of Li - Ni Fe 2 O 4 nanoparticles with 2–31 nm demonstrates a face centered cubic spinel phase. The scanning electron microscopy and high resolution transmission electron microscopy images highlight moderate good nanocrystalline nature as compared to x = 0.4 concentration. The dielectric analysis shows that Li - Ni Fe 2 O 4 NPs has a high dielectric constant at x = 0.2 concentration and then reduced with respect to annealing temperature and concentration. The magnetization curves demonstrate soft magnetic nature where, the saturation and remnant magnetization increases and then coercivity decreases due to increase of annealing temperature and concentration.

中文翻译：

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锂（Li）取代铁氧体镍（NiFe2O4）纳米颗粒的结构、介电和增强软磁性能

摘要 Li - Ni Fe 2 O 4 NPs 采用简单的化学共沉淀法制备。2-31 nm 的 Li - Ni Fe 2 O 4 纳米颗粒的结构分析显示出面心立方尖晶石相。与 x = 0.4 浓度相比，扫描电子显微镜和高分辨率透射电子显微镜图像突出了中等良好的纳米晶体性质。介电分析表明，Li - Ni Fe 2 O 4 NPs 在 x = 0.2 浓度下具有高介电常数，然后随退火温度和浓度而降低。磁化曲线表现出软磁性质，其中饱和磁化强度和剩余磁化强度增加，然后由于退火温度和浓度的增加矫顽力降低。