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Title: Dielectric properties of Ti<sub>x</sub>Li<sub>1</sub><sub>-x</sub>La<sub>0.1</sub>Fe<sub>1.9</sub>O<sub>4</sub> ferrite thin films
Authors: Abdelmoneim, H M
Keywords: Dielectric constant
Loss factor
<i>ac</i> Conductivity
CBH model
Issue Date: Aug-2010
Publisher: CSIR
Abstract: The variation of dielectric constant (ε'), dielectric loss factor (ε") and the <i>ac</i> conductivity (σ<sub>ac</sub>) of mixed Ti<sub>x</sub>Li<sub>1</sub><sub>-x</sub>La<sub>0.1</sub>Fe<sub>1.9</sub>O<sub>4</sub> (where <i>x</i> = 0.1, 0.3, 0.5, 0.7 and 0.9) ferrite thin films has been studied as a function of both frequency and temperature. The variation of dielectric constant with different temperature in all films gives a broad peak. The maximum peak is almost fixed at 500 K independent of lithium content. The ε'(f) and ε"(&nbsp;<i>f&nbsp;</i>) curves at different temperatures for all samples show a higher dispersion in the low frequency region. The conduction phenomenon is explained on the basis of a correlated barrier hopping (CBH) model. According to the CBH model, the maximum barrier height at infinite separation (<i>U</i><sub>M</sub>) is determined
Description: 562-570
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.48(08) [August 2010]

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