Polaronic transport in the ferromagnetic phase of Gd_(1-x)Ca _xBaCo_2O_(5.53)

Thirumurugan N.; Sundar C.S.; Bharathi A.

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Polaronic transport in the ferromagnetic phase of Gd_(1-x)Ca _xBaCo_2O_(5.53)

机译：Polaronic transport in the ferromagnetic phase of Gd_(1-x)Ca _xBaCo_2O_(5.53)

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摘要

Temperature dependent electrical resistivity and thermopower measurements were carried out on Gd_(1-x)Ca_xBaCo_2O _(5.53) with x varying between 0 and 0.25. Ca substitution leads to the incorporation of holes (Co~(4+)) 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.

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《Solid State Communications》 |2011年第21期|1511-1514|共4页
作者
Thirumurugan N.; Sundar C.S.; Bharathi A.;
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作者单位

Condensed Matter Physics Division, Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, India;

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原文格式 PDF
正文语种英语
中图分类固体物理学;
关键词
A. Cobaltites; D. Polaronic transport; E. Resistivity thermopower;

Polaronic transport in the ferromagnetic phase of Gd_(1-x)Ca _xBaCo_2O_(5.53)

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