Volume 5, Issue 4 (12-2005)                   IJPR 2005, 5(4): 249-254 | Back to browse issues page

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S. R. Ghorbani. Thermoelectric power and evidence of carriers localization in Y1-2xCaxThxBa2Cu3O7-& delta superconductors. IJPR. 2005; 5 (4) :249-254
URL: http://ijpr.iut.ac.ir/article-1-217-en.html
Abstract:   (16859 Views)

 In this study polycrystaline samples of Y1-2xCaxThxBa2Cu3O7-δ with x=0, 0.025, 0.05, 0.075 were made by standard solid state methods. The transport and superconducting properties have been studied by the thermoelectric power S(x,T) measurements as a function of temperature and doping concentration. The critical temperature decreased linearly by increasing the doping concentration. S(x,T) was analysed and well described by a phenomenalogical narrow band model. The critical temperature, room temperature thermoelectric power S(290 K) and phenomenological narrow band model results were suggested in wich charge carrier (hole) localization was the main reason of the suppression of superconductivity in this alloys.

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Type of Study: Research | Subject: General

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