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Impact of indium substitution on dielectric and magnetic properties of Cu 0.5 Ni 0.5 Fe 2-x O 4 ferrite materials
Junaid, M ; Sharif University of Technology | 2019
632
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- Type of Document: Article
- DOI: 10.1016/j.ceramint.2019.04.042
- Publisher: Elsevier Ltd , 2019
- Abstract:
- Indium substituted Cu[sbnd]Ni nanoferrites with nominal compositions Cu 0.5 Ni 0.5 In x Fe 2-x O 4 (x = 0.00–0.32)were successfully synthesized by sol-gel auto ignition method. X-ray diffraction patterns illustrated the single phase spinel structure for x ≤ 0.24. The lattice parameter ‘a’ increased from 8.3349 to 8.3723 Å and then it decreased for x = 0.32. X-ray density increased from 5.43 to 5.79 g/cm 3 . The average crystallite sizes lie in the range 33.21–17.78 nm. The cell volume was increased from 579.03 to 586.86 Å 3 with the substitution of indium ions into the spinel lattice of copper nickel ferrites. The compositional dependence of tetrahedral and octahedral radii was explained on the basis of lattice parameter. The incorporation of In 3+ ions in copper nickel ferrites exhibited the decreased in bulk density. The dielectric parameters were explained over entire range of frequency (1M-3 GHz). The dielectric parameters i.e dielectric constant, dielectric loss and tan loss were found to decrease with the increase of indium concentration. The saturation magnetization (M s )and Bohr magneton (n B )first increased and then decreased. The remanence (M R )was increased with the substitution of indium ions. The coercivity and anisotropy constant were decreased which might be due to weak A-B super exchange interaction. The results of magnetic and dielectric properties suggested that In 3+ substituted copper nickel ferries are suitable for high frequency applications. © 2019 Elsevier Ltd and Techna Group S.r.l
- Keywords:
- Dielectric properties ; Indium substituted ferrites ; Copper compounds ; Dielectric losses ; Exchange interactions ; Ferrites ; Indium ; Indium compounds ; Ions ; Iron compounds ; Lattice constants ; Nickel compounds ; Saturation magnetization ; Sol-gels ; Dielectric and magnetic properties ; High-frequency applications ; Magnetic ; Magnetic and dielectric properties ; Properties ; Single-phase spinel structure ; Spinel structure ; Substituted ferrites ; Dielectric materials
- Source: Ceramics International ; Volume 45, Issue 10 , 2019 , Pages 13431-13437 ; 02728842 (ISSN)
- URL: https://www.sciencedirect.com/science/article/pii/S0272884219308636#!