Studies on the transport properties of RuSr2RECu2Oy, RuSr2(RE)2Cu2Oy(RE=Gd, Nd) and RuSr2Gd1.4Ce0.6Cu2O10: Possibility of variable range hopping

Roy, Atanu; Jamadar, T.A.; Ghosh, Ajay

doi:10.1016/j.physc.2013.02.006

Cited by 3 publications

(1 citation statement)

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“…In this case the characteristic hopping length increase with decreasing temperature. This kind of hopping is called variable range hopping [24,25]. We see that at lower temperatures variable range hopping is applicable while at higher temperatures above characteristic temperature T* thermal conduction mechanism is favored [26].…”

Section: Electrical Analysismentioning

confidence: 99%

Facile synthesis and conduction mechanism in RE-substituted oxide systems for enhanced thermoelectric performance

Ahmed

Munir

Khan

et al. 2015

J Mater Sci: Mater Electron

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Bismuth based oxide nanomaterials with doping of rare earth element Nd were synthesized by simplified sol-gel method. Elemental composition was Bi 2 Ca 2-X R X CoO 6 where R is for rare earth neodymium (Nd). Structural characterizations have shown monoclinic crystal structure with C2/c space group. Differential scanning calorimetery and thermogravimetric analysis were done for thermal behavior of nanomaterials. Thermal stability of samples were enhanced after doping of rare earth element. Electrical resistivity measurements were carried out as a function of temperature, which showed decrease in resistivity with increase in temperature. Thermal transport properties like thermal conductivity, thermal diffusivity and volumetric heat capacity were measured. Thermal conductivity measurements have shown lower values after doping. Variation in thermal transport properties with temperature are also discussed. These results suggest that Nd is the effective element for improving thermoelectric properties of bismuth based cobalt oxides.

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Section: Electrical Analysismentioning

confidence: 99%