Synthesis and magnetic properties of Cu0.5Ni0.5Fe2O4 nanoparticles produced by glycothermal and hydrothermal processes |
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| Authors: | J. Z. Msomi T. Moyo |
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| Affiliation: | 1. Department of Physics, Qwaqwa Campus, University of the Free State, P/Bag X13, Phuthaditjhaba, 9866, South Africa
2. School of Physics, Westville Campus, University of KwaZulu-Natal, Durban, 4000, South Africa
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| Abstract: | Cu0.5Ni0.5Fe2O4 nanoparticles have been synthesized in ethylene glycol solution and in deionised water. The glycothermal reaction was carried at 200°C under gauge pressure of 100 psi. The hydrothermal treatment was done at 100°C under zero pressure. Complete single-phase cubic spinel structure in the samples made by glycothermal (sample G) and hydrothermal (sample H) processes formed after annealing at 600°C and 900°C respectively. The coercive field of sample H increases from 72 Oe to 133 Oe after sintering at 700°C and then decrease to 11 Oe on sintering at 1000°C. This variation is attributed to surface effects and crossover from single to multidomain behavior due to increasing particle size. |
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