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Thermopower of magnetically aligned YBa2Cu3O7−δceramics: an approach for measuring anisotropic transport properties of ceramics

Physica C Superconductivity
Publication Date
DOI: 10.1016/s0921-4534(97)00810-1


Abstract We present the thermopower (TEP) within the ab plane and c axis of magnetically aligned YBa 2Cu 3O 7−δ ceramics with different oxygen contents. For the sample with almost fully loaded oxygen content ( δ = 0.05), TEP exhibits strong anisotropy, namely, the ab-plane TEP behaves distinctly from that along the c axis. The ab-plane TEP bears remarkable similarities to that of the b-axis in an untwinned YBa 2Cu 3O 7−δ ( δ = 0.08) single crystal. The c-axis TEP is nearly identical to that of a twinned YBa 2Cu 3O 7−δ single crystal. These measurements make available the anisotropic property measurements of ceramic samples by aligning polycrystallites using magnetic forces.

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