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Well-dispersed uniform NiFe2O4 nanoparticles (NPs) with an average particle size of 15.4nm were synthesized by thermal decomposition of a metal–organic salt, and then were diluted in a SiO2 matrix via a sol–gel method with different concentration. The magnetization (M) dependence of NiFe2O4/SiO2 on the temperature (T) and on the applied magnetic field (H) was systematically characterized by the Quantum...
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