Thermoelectric Power of YBa2Cu3O7-X and YBa2Cu4O8 Under Pressure
Thermoelectric power (TEP) of YBa2Cu3O7-X (123) and YBa2Cu4O8 (124) samples are measured as a function of pressure. The TEP of an as-sintered 123 polycrystalline sample shows a broad maximum around 1.25 GPa whereas that of the cold-pressed sample decreases steadily. The ab-plane TEP of 123 single cr...
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| Main Author: | |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
1993-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/1993/32872 |
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| Summary: | Thermoelectric power (TEP) of YBa2Cu3O7-X (123) and YBa2Cu4O8 (124) samples are measured as a function of pressure. The TEP of an as-sintered 123 polycrystalline sample shows a broad maximum around 1.25 GPa whereas that of the cold-pressed sample decreases steadily. The ab-plane TEP of 123
single crystal decreases monotonically and the c-axis TEP exhibits a maximum around 1.5 GPa. Disappearance
of the broad maximum in the polycrystalline sample upon cold-pressing is interpreted in
terms of the crystallite orientation occurring under pressure. TEP of the 124 polycrystalline sample
decreases sharply up to 4.5 GPa and at a lower rate with further increase in pressure, a trend similar
to that is observed in the variation of Tc as a function of pressure. |
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| ISSN: | 0882-7516 1563-5031 |