Abstract
Ni1-xZnxFe2O4 (0 ≤ x ≤ 1) nanoparticles were synthesized via co-precipitation method in order to study their structural and magnetic properties as well as their heating efficiency. Structural results show that the annealed samples at 1000 °C exhibit a single cubic spinel structure while the mean crystallites size is ranging from 70 to 130 nm, as x increases. Rietveld refinement was also performed to deduce both cation distribution and lattice parameter. Mössbauer spectroscopy at room temperature shows the decrease of the average hyperfine field with the increase of the zinc content. Magnetic curves indicate that saturation magnetization was increased with the increase of zinc concentration, up to x = 0.5, then decreased. These results have been explored to explain the magnetic heating characteristics of the samples under an AC magnetic field at a fixed frequency. The intrinsic loss power (ILP) of sample with x = 0.5 is found about 0.42 nH m2kg-1, this value allows the use of x = 0.5 for the in-situ hyperthermia treatment of cancer cells as application.
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