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Enhancement in Dielectric and Magnetic Properties of {\rm In}^{3+} Substituted Ni-Zn Nano-Ferrites by Coprecipitation Method

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3 Author(s)
Thakur, A. ; Dept. of Phys., Nat. Taiwan Univ., Taipei, Taiwan ; Thakur, P. ; Jen-Hwa Hsu

Indium substituted nano nickel zinc ferrites Ni0.5Zn0.5InxFe2-xO4 with x=0, 0.1, 0.2 and 0.3 are synthesized by a coprecipitation method. Magnetic and dielectric properties are studied over a frequency range 1-30 MHz. Initial permeability is found to be in the range of 9-19 with a magnetic loss tangent of 10-1-10-2 . The dielectric constant is noticed in the range of 11-17 along with low dielectric loss tangent (10-1-10-3). The composition with x=0.2 is found to have the highest specific saturation magnetization of 78.8 emu/g. Appreciable dielectric and magnetic values along with low losses can be correlated to small grain size and better compositional stoichiometry obtained as a result of processing by coprecipitation method. These fascinating dielectric and magnetic properties of these materials reveal a direction for high-frequency applications.

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Magnetics, IEEE Transactions on  (Volume:47 ,  Issue: 10 )