Abstract:

Nanoparticles of Ni0.6 Zn0.4 Crx Fe 2-x O4 were prepared and characterized to understand their structural XRD, FTIR and electrical properties such as dc resistivity as a function of temperature. The dielectric constant (ε`) and dielectric loss (tanδ) are also studies as a function of frequency and temperature. It observes the value of dielectric constant is beginning arises for x = 0.2 and 0.4 at 530ko and for x = 0.6 at 510ko . Loss coefficient is decreases with increased frequency in all the thin film samples except x = 0.4 . Surface morphology and particle orientation have been investigated by TEM and SEM images. It have scientific and technological importance in recent years due to their magnetic properties and wide range of applications especially when the size of the particles approaches to nanometer scale. They have been used for high-frequency transformer cores, rod antennas, and radio-frequency coils. More recently, these are also used in nanoelectronic devices, high-speed integrated circuits as well as in biomedical field as contrasting agents used for magnetic resonance imaging (MRI). Spinel ferrites are materials with good magnetic and electronic properties, which depend strongly on the cation distribution among the tetrahedral and octahedral sites.

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