Abstract
Gadolinium substituted cobalt ferrite nanocrystals with composition of CoFe2−xGdxO4 (x = 0–0.04 in a step of 0.01) were prepared by a hydrothermal process and without subsequent annealing. X-ray diffraction, field-emission scanning electron microscopy, and vibrating sample magnetometer were used to investigate the effect of Gd3+ cation substitution on structural Characteristics and magnetic properties of cobalt ferrite nanocrystals. The X-ray diffraction analysis demonstrated that single phase spinel ferrites were obtained. The FE-SEM micrographs of the synthesized samples indicated the presence of two distinct groups of grains exhibiting different sizes and, more important, different shapes. The results of magnetic hysteresis at a room temperature showed that with an increase in gadolinium content, the coercive field decreased from 1250 Oe for x = 0 to 450 Oe for x = 0.03. In addition, it was observed that with substitutions of gadolinium cations, the values of saturation magnetization decreased.
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Sodaee, T., Ghasemi, A. & Razavi, R.S. Microstructural Characteristics and Magnetic Properties of Gadolinium-Substituted Cobalt Ferrite Nanocrystals Synthesized by Hydrothermal Processing. J Clust Sci 27, 1239–1251 (2016). https://doi.org/10.1007/s10876-015-0925-3
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DOI: https://doi.org/10.1007/s10876-015-0925-3