An experimental investigation of the off-diagonal Seebeck effect on textured YBCO high-T-C superconductor

作者：He ZH^*; Ma ZG; Luo YY; Li QY; Chen XY; Zhang JX; Shi D

来源：Applied Superconductivity, 1996, 4(12): 619-623.

The off-diagonal Seebeck effect was investigated on a melt-textured YBa2Cu3O7-delta (YBCO) high-T-c superconductor. It was found that the transverse voltage V-x was proportional to the longitudinal temperature difference Delta T-c. 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 Delta T-c, 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 mu V K-1.

• 出版日期1996-12
• 单位中山大学