Abstract
ABSTRACTThe electrical resistivity was fitted with the phenomenological percolation model, which is based on the phase segregation of ferromagnetic metallic clusters and paramagnetic isolant regions. So, we found that the estimated results are in adequate accordance with experimental data. The relationship between electrical and magnetic properties of manganites has been traced through the analysis of temperature dependence of the La0.6Sr0.4Mn0.9V0.1O3 resistivity. The estimated critical exponents are (β = 0.326 ± 0.01; γ=1.237 ± 0.02 and α = 0.112). The values of these exponents obtained from resistivity are very close to them predicted by the 3D-Ising model. These results are in good agreement with the analysis of critical exponents from magnetization measurements. The obtained values of the temperature coefficient of resistance (TCR) for La0.6Sr0.4Mn0.9V0.1O3 sample is comparable with some systems used for infrared sensors.
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