Normal-state Hall effect measurements for Tl0.8Hg0.2Ba2Ca2Cu3O9−δ substituted by Sm and Yb

The normal-state Hall effect for Tl0.8Hg0.2Ba2Ca2−xRxCu3O9−δ, where R=Sm and Yb with 0≤x≤0.150≤x≤0.15, is measured above the superconducting transition temperature. The Hall coefficients RHRH, for all prepared samples, are positive and follow the Curie–Weiss temperature dependence type. Carrier-concentrations nHnH decrease as the substitution-content xx increases, as a result of the hole-filling mechanism. The sample with lower resistivity exhibits higher carrier-concentration. The Hall angle cot θHθH increases as the temperature increases and well fitted to the formula cot θH=αT2+βθH=αT2+β. The constant ββ is found to be strongly dependent on the substitution-content and it is correlated to the residual resistivity ρ0ρ0. Finally, the variation of Hall mobility with both temperature and substitution-content is reported.