Gadolinium doped zinc ferrite nanoparticles with the composition of ZnFe2-xGdxO4(x = 0 � 0.3) have been synthesized using hydrothermal reactions of metal nitrate solutions at 200 C for 12 hours. XRD analysis showed that the mean crystallite sizes of the particles were in the range of 18-25 nm. Temperature dependence of magnetic susceptibility measurements revealed that all samples were superparamagnetic at low temperatures. The block temperatures were 17K, 17K, 15K and 11K for ZnFe2-xGdxO4 nanoparticles (x = 0, 0.05, 0.10 and 0.20), respectively. The magnetic moment increased with the increasing Gd amount as showed by hysteresis loops at 5 K and 300 K. For example, the saturation moments at 50 kOe field and 5.0 K were 28.3 emg/g, 37.9 emu/g and 46.6 emu/g for ZnFe2-xGdxO4 nanoparticles (x = 0, 0.10 and 0.20), respectively.

Magnetic properties of gadolinium doped zinc ferrite nanoparticles

245th National Meeting (2013)

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