Issue Information
روزنامه با شماره پیاپی سال 2011
Pages
4
From page
1511
To page
1514
Abstract
Temperature dependent electrical resistivity and thermopower measurements were carried out on Gd1−xCaxBaCo2O5.53 with x varying between 0 and 0.25. Ca substitution leads to the incorporation of holes (Co4+) into the system that leads to a reduction in resistivity and a stabilisation of the ferromagnetic phase at low temperatures. The temperature dependence of resistivity and thermopower are markedly different in the Ca doped sample, with a dramatic reduction in the resistivity, as compared to that in the pristine sample. The variation in both the resistivity and thermopower with temperature is explained in terms of the transport of polarons in the ferromagnetic phase of Ca doped system.
Journal title
Acta Tropica
Serial Year
2011
Journal title
Acta Tropica
Record number
1750488
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