Abstract
The physical and magnetic properties of NiZn ferrite nanoparticles have been determined. The particles were prepared by the wet method and dispersed as ferrofluids. Particles were prepared with 0.3Zn to 0.7Zn. Dry samples were used to investigate lattice parameters by X-ray diffraction. The physical particle sizes were measured by transmission electron microscopy and found to be typically 9 nm. Particle sizes were also determined by magnetic measurements and found to be around 5 nm, indicating a non-magnetic coating layer of about 4 nm. The Curie temperature was investigated for dry samples and found to decrease with the inverse square of the zinc content.
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