Zehra DURMUŞ, Abdulhadi BAYKAL, Hüseyin KAVAS, Nermin KASAPOĞLU, Muhammet S. TOPRAK, Yüksel KÖSEOĞLU

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CTAB-assisted hydrothermal synthesis and magnetic characterization of $Ni_x Co_{1-x}Fe_2O_4$ nanoparticles (x = 0.0, 0.6, 1.0)

CTAB-assisted hydrothermal synthesis and magnetic characterization of $Ni_x Co_{1-x}Fe_2O_4$ nanoparticles (x = 0.0, 0.6, 1.0)

Nickel ferrite, $Ni_x Co_{1-x}Fe_2O_4$ , NPs (where x = 0.0, 0.6 and 1.0) were successfully synthesized by a rapid and reproducible CTAB-assisted hydrothermal route. The influence of different hydrolyzing agents on the particle size and magnetic behavior of $Ni_x Co_{1-x}Fe_2O_4$ NPs was investigated. Particles showed very high phase purity and crystallinity in powder XRD analysis. Compositions of Co, Fe, and Ni in fabricated powders were also determined by AAS and results are in very good agreement with the targeted compositions. Samples hydrolyzed using NH3 showed no significant changes in the particle size and morphology. NH3 hydrolyzed samples were much smaller than their NaOH hydrolyzed counterparts, which was attributed to the strength and concentration of the hydrolyzing agents, NH3 being about 6 times more concentrated than NaOH. This in turn influenced the nucleation rate thus the size of each nucleus formed. Strong temperature and Ni concentration dependence of magnetic parameters was observed. These samples are considered as promising materials for high density magnetic recording media.
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Turkish Journal of Chemistry-Cover
  • ISSN: 1300-0527
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Arşiv
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