Abstract
The normal-state Hall effect for Tl0.8Hg0.2Ba2Ca2-xRxCu3O9-delta 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 theta(H) increases as the temperature increases and well fitted to the formula cot theta(H) = alpha T-2 + beta. The constant beta is found to be strongly dependent on the substitution-content and it is correlated to the residual resistivity rho(0). Finally, the variation of Hall mobility with both temperature and substitution-content is reported. (c) 2008 Elsevier Ltd. All Rights reserved.