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Home > Issues > RetrieveInfluences of Postannealing Treatment Parameters on the Structural and Magnetic Properties of Nickel-Doped Cobalt Ferrite Synthesized by Sol-Gel Route
Journal of Magnetics, Volume 27, Number 1, 31 Mar 2022, Pages 88-95
Sri Budiawanti (Physics Education Department, Faculty of Teacher Training and Education, Universitas Sebelas Maret), R. Amalia (Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret), D. T. Rahardjo (Physics Education Department, Faculty of Teacher Training and Education, Universitas Sebelas Maret), Suharno (Physics Education Department, Faculty of Teacher Training and Education, Universitas Sebelas Maret), B. Purnama * 
(Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret), D. Djuhana (Physics Department of Universitas Indonesia)
(Physics Department, Faculty of Mathematics and Natural Sciences, Universitas Sebelas Maret), D. Djuhana (Physics Department of Universitas Indonesia)
Abstract
We prepared and characterized nickel-substituted cobalt ferrite (Ni0.1Co0.9Fe2O4) nanoparticles using the sol-gel
method. The physical properties of the nanoparticles have been modified by postannealing treatment at atmospheric
conditions. X-ray diffraction results confirmed that the nanoparticles possessed a single-phase face-centered
cubic crystalline structure. The crystallite sizes increased from 20.85 to 26.06 nm with the increased
annealing temperature. Transmission electron microscopy results confirmed the crystal structure of the nickelsubstituted
cobalt ferrite nanoparticles. Furthermore, Fourier-transform infrared spectroscopy results showed
that the typical characteristic absorption of the nanoparticles was obtained at wave numbers k = 575 and 374
cm−1. Finally, the saturation magnetization and coercivity of the nanoparticles increased with the annealing
temperature, which is attributed to the increase in magnetic anisotropy constant.
method. The physical properties of the nanoparticles have been modified by postannealing treatment at atmospheric
conditions. X-ray diffraction results confirmed that the nanoparticles possessed a single-phase face-centered
cubic crystalline structure. The crystallite sizes increased from 20.85 to 26.06 nm with the increased
annealing temperature. Transmission electron microscopy results confirmed the crystal structure of the nickelsubstituted
cobalt ferrite nanoparticles. Furthermore, Fourier-transform infrared spectroscopy results showed
that the typical characteristic absorption of the nanoparticles was obtained at wave numbers k = 575 and 374
cm−1. Finally, the saturation magnetization and coercivity of the nanoparticles increased with the annealing
temperature, which is attributed to the increase in magnetic anisotropy constant.
Keywords: cobalt ferrite; substituted; nickel; sol-gel, annealing
DOI: https://doi.org/10.4283/JMAG.2022.27.1.088
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