Thermoelectric power of YBa2Cu3Osub(7-δ) under pressure upto 9GPa

Thermoelectric power (TEP) of two YBa2Cu3Osub(7-δ) compounds (with δ=0.17 and 0.21) was measured as a function of quasi-hydrostatic pressure up to 9GPa at 300 K on samples with low porosity. In both cases TEP decreases with increasing pressure, at a rate ∼0.8μVK-1/GPa. The data obtained under hydrostatic pressure up to 3 GPa are in good agreement with those under quasi-hydrostatic pressure. The TEP of both compositions is found to decrease linearly at a rate 0.8 μVK-1/GPa above 1.5 GPA. (author). 17 refs