THERMOELECTRIC-POWER OF THE BI2SR2CA1-XCEXCU2O8+Y SYSTEM

Single-phase Bi2Sr2Ca1-xCexCu2O8+y (x = 0-0.4) samples were prepared b y a solid state reaction method. The thermoelectric power (TEP) of the system was measured, for the first time, in the liquid nitrogen tempe rature range. The TEP results are similar to those of high-T-c superco nductor systems doped with other rare earth elements or with different oxygen contents. Several two-band models are used and compared to jud ge which model is more suitable for describing the TEP behaviour of hi gh-T-c superconductors in the normal state.