Influence of Cu2+, Ni2+, and Zn2+ Ions Doping on the Structure, Morphology, and Magnetic Properties of Co-Ferrite Embedded in SiO2 Matrix Obtained by an Innovative Sol-Gel Route

Nanomaterials

IosifGrigore Deac¹  Thomas Dippong²  ErikaAndrea Levei³  Oana Cadar³  Emilia Neag³ 

[1] Babes-Bolyai University, Faculty of Physics, 1 Kogalniceanu Street, 400084 Cluj-Napoca, Romania;Department of Chemistry and Biology, Technical University of Cluj-Napoca, North University Center of Baia Mare, 76 Victoriei Street, 430122 Baia Mare, Romania;INCDO-INOE 2000, Research Institute for Analytical Instrumentation, 67 Donath Street, 400293 Cluj-Napoca, Romania;

关键词: cobalt ferrite;    metal doping;    sol-gel;    nanocomposites;    magnetic properties;   

DOI  :  10.3390/nano10030580

来源: DOAJ

【 摘 要 】

This paper presents the synthesis of metal doped Co ferrites, M_0.2Co_0.8Fe₂O₄ (M = Cu²⁺, Ni²⁺, and Zn²⁺) embedded in SiO₂ matrix by an innovative sol-gel route. The structural and morphological characterization provided information about the crystalline phases, crystallite size, and the shape of the prepared ferrites. The thermal study depicted the thermal decomposition and stability of the obtained ferrites. X-ray diffraction indicated nanocrystalline ferrites with spinel structure and the lack of crystalline phase impurities, while Fourier transform infrared spectroscopy revealed the presence of functional groups in precursors and ferrite powders. The lattice parameters showed a gradual increase indicating a uniform distribution of divalent metal ions in the Co ferrite lattice. The crystallite size, magnetic moment, super-exchange and deflection of magnetic domain were influenced by the dopant metal ion. The room temperature magnetization indicated a ferromagnetic behavior of the ferrites annealed at 1000 °C and a superparamagnetic behavior of the ferrites annealed at 700 °C.

【 授权许可】

Unknown