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 ≤ 0.15 , is measured above the superconducting transition temperature. The Hall coefficients R H , for all prepared samples, are positive and follow the Curie–Weiss temperature dependence type. Carrier-concentrations n H decrease as the substitution-content x increases, as a result of the hole-filling mechanism. The sample with lower resistivity exhibits higher carrier-concentration. The Hall angle cot θ H increases as the temperature increases and well fitted to the formula cot θ H = α T 2 + β . The constant β is found to be strongly dependent on the substitution-content and it is correlated to the residual resistivity ρ 0 . Finally, the variation of Hall mobility with both temperature and substitution-content is reported.