Thermoelectric power of YBa2Cu3O7−δ under pressure up to 9 GPa
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Thermoelectric power (TEP) of two YBa2Cu3O7−δ compounds (with δ=0·17 and 0·21) was measured as a function of quasi-hydrostatic pressure up to 9GPa at 300K on samples with low porosity. In both cases TEP decreases with increasing pressure, at a rate ∼ 0·8 μVK−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.
KeywordsThermoelectric power quasi-hydrostatic pressure hydrostatic pressure
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