Abstract
A series of cobalt-doped nickel ferrite nanoparticles, Cox Ni1−xFe2O4 (x = 0.2, 0.4, 0.6, 0.8), was synthesized by hydrothermal method at low temperature, and its structural, morphological, and magnetic properties have been examined. The structural properties were studied from X-ray diffraction with crystallite size 18.9 to 24.09 nm. The presence of Co, Ni, Fe, and oxygen as well as purity of the synthesized nanoparticles was confirmed by energy-dispersive spectrum (EDS). The study of morphology carried out with field emission scanning electron microscopy (FESEM) reveals that the prepared nanoparticles are oriented as non-porous and stone-like and observed strong agglomeration between the particles. The magnetic properties such as saturation magnetization, coercivity, and retentivity have been calculated by vibrating sample magnetometry (VSM); saturation magnetization and remanence magnetization from M-H loop suggested that these materials are applicable for the memory device applications, and low coercive field and S-shaped hysteresis revealed just about superparamagnetic nature.
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Acknowledgments
The authors express their thanks to the Department of Physics, Sri Krishnadevaraya University, Anantapuramu, for providing laboratory facilities to carry out the present research work.
Funding
This work was financially supported by the UGC under SAP [NO.F 530/5/DRS-II/2016(SAP I)] and the Department of Science and Technology under FIST [SR/FST/PSI-116/2007], New Delhi.
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Khan, T.F., Naresh, U., Ramprasad, T. et al. Structural, Morphological, and Magnetic Properties of Cobalt-Doped Nickel Ferrite Nanoparticles. J Supercond Nov Magn 34, 797–803 (2021). https://doi.org/10.1007/s10948-020-05788-5
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DOI: https://doi.org/10.1007/s10948-020-05788-5