Abstract
The off-diagonal Seebeck effect was investigated on a melt-textured YBa 2 Cu 3 O 7− δ (YBCO) high- T c superconductor. It was found that the transverse voltage V x was proportional to the longitudinal temperature difference Δ T z , measured directly with a pair of differential thermocouples, for textured samples with their c -axes tilted with respect to the surface’s normal. This supported the idea that the off-diagonal thermoelectric effect accounts for the anomalously high laser-induced transverse voltage on the oriented YBCO superconducting thin films. The variation of the V x against the sample’s thickness d , at a given Δ T z , deviated from the inversely proportional relationship when the sample was too thin. The deviation was discussed qualitatively in terms of deteriorated surface layers. The data of V x ( d ) was fitted to obtain a reasonably reliable ∣ S c − S ab ∣ value of 12 μ V K −1 .
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