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Enhanced magnetic properties of Dy3+ substituted Ni-Cu-Zn ferrite nanoparticles

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6 Author(s)
Shirsath, Sagar E. ; Department of Physics, Vivekanand College, Aurangabad 431001 (MS), India ; Kadam, R.H. ; Patange, S.M. ; Mane, M.L.
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Dy3+ substituted Ni-Cu-Zn (Ni0.4Cu0.4Zn0.2DyxFe2-xO4) ferrite nanoparticles were obtained at 600 °C by synthesizing sol-gel auto-combustion method, and they exhibit a particle size of 12–21 nm. X‐ray diffraction patterns confirm the presence of secondary phase of DyFeO3 and Fe2O3 for the Dy3+ substituted samples. Ni‐Cu‐Zn ferries doped with Dy3+ possess better grain structure and growth than that of pure Ni‐Cu‐Zn ferrite. The saturation magnetization increases remarkably up to 81 emu/g with increasing the Dy3+ ions. The increased saturation magnetization related to increased exchange interactions between Fe‐Fe ions and also with increased particle size. Blocking temperature was found to decrease with increasing Dy3+ substitution. An enhancement in initial permeability and Curie temperature was observed with Dy3+ substitution.

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Applied Physics Letters  (Volume:100 ,  Issue: 4 )