Low dielectric loss of Mg doped Ni-Cu-Zn nano-ferrites for power applications

► Magnesium substituted Nickel Copper Zinc nano-ferrite having general formulae Ni0.5−xCu0.2Zn0.3MgxFe2O4(0.0 ≤ x ≤ 0.4) has been prepared at relatively lower temperature (900 °C) by sol-gel technique. ► The value of permittivity is observed to increase to a maximum value of ∼8 × 102 for x = 0.4 sample. ► A remarkable decrease in power loss and loss tangent is observed with the increase in Mg concentration, which is useful for power application of ferrites. ► Improvement in magnetic properties has also been observed in the magnesium substituted Nickel Copper Zinc nano-ferrite.