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(Color online) X‐ray powder diffraction for Ni0.4Cu0.4Zn0.2DyxFe2−xO4 for x = 0.0, 0.025 and x = 0.1.
(Color online) Variation of magnetization with applied field at 300 K, (a) Ni0.4Cu0.4Zn0.2Fe2O4, (b) Ni0.4Cu0.4Zn0.2Dy0.025Fe1.975O4, (c) Ni0.4Cu0.4Zn0.2Dy0.05Fe1.95O4, (d) Ni0.4Cu0.4Zn0.2Dy0.075Fe1.925O4, and (e) Ni0.4Cu0.4Zn0.2Dy0.1Fe1.9O4.
(Color online) Variation of initial permeability (μ i) and Curie temperature (Tc) with Dy3+ content x. Inset shows the variation of initial permeability (μ i) with temperature for x = 0.1.
(Color online) Typical plot of temperature dependence of magnetic susceptibility for FC and ZFC for x = 0.05 at applied field of 100 Oe. Inset shows the (a) magnifying view of ZFC–FC curve splitting and (b) dependence of TB on Dy3+ content x.
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