Article ID Journal Published Year Pages File Type
9783025 Materials Chemistry and Physics 2005 4 Pages PDF
Abstract
The electrical resistivity and thermoelectric power measurements of Zn-substituted Li-Mg ferrites having the general formula LixMg0.4Zn0.6−2xFe2+x04 (where x = 0, 0.05, 0.1, 0.15, 0.2, 0.25 and 0.3) were carried out from room temperature to 600 °C. The variation of log ρ with reciprocal of temperature shows a discontinuity at Curie temperature. The activation energy in the ferrimagnetic region is found to be lower than that in paramagnetic region. The conduction mechanism is explained on the basis of hopping of electrons. The variation of room temperature resistivity with composition indicates that resistivity initially decreases with Zn content up to 0.3 and then it increases with further increase in Zn content. The Curie temperature is found to decrease linearly with addition of Zn. The variation of Seebeck coefficient with temperature indicates that all the samples show n-type conductivity.
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Physical Sciences and Engineering Materials Science Electronic, Optical and Magnetic Materials
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