Electric and Dielectric Properties of Ni Substituted Mg-Zn-Cu Ferrites

S. G. Bachhav ； A. A. Patil ； D. R. Patil

《Advances in Ceramic Science and Engineering》 2卷2期 (2013/05) Pp. 89-94

並列摘要

The electrical properties of the spinel ferrite having general chemical formula Ni_xMg_(0.5-x)Cu_(0.1)Zn_(0.4)Fe_2O_4 (where x=0.1, 0.2, 0.3, 0.4 & 0.5) have been studied. The samples in the series were prepared by standard double sintering ceramic method. DC resistivity (ρ) measurements were carried out as a function of temperature using simple two-probe method and activation energy (ΔE) was determined. It is found that conduction is due to formation of small polarons. The Curie temperature for the samples was determined from resistivity versus temperature curve. The dielectric parameters such as dielectric constant, loss tangent were determined as a function of frequency in the range 100Hz-1MHz at room temperature. The compositions exhibit normal dielectric behaviour, which is attributed to Maxwell-Wagner type interfacial polarization. AC conductivity calculated as a function of frequency at room temperature was found to be increase with a rise in frequency exhibiting normal ferrimagnetic behaviour.

並列關鍵字

Magnetic Materials ； Ceramic Method ； Dielectric Properties ； Electrical Properties