S. D. Peacor

Thermoelectric power of Ba1-xKxBiO3

We report measurements of thermoelectric power of two superconducting samples of Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} with differing resistivity behaviors. The thermopower is negative between 50 and 300 K. We find in both samples an unusual temperature dependence similar to that in high-oxygen-content samples of Y-Ba-Cu-O with negative thermopower, suggesting a common mechanism producing this behavior in Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} and the Cu-O-plane superconductors. Our sample with an activated temperature dependence of resistivity shows a change to positive thermopower before becoming superconducting, possibly due to the effect of nonmetallic grain boundaries.

Thermoelectric power of Ba sub 1 minus x K sub x BiO sub 3

We report measurements of thermoelectric power of two superconducting samples of Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} with differing resistivity behaviors. The thermopower is negative between 50 and 300 K. We find in both samples an unusual temperature dependence similar to that in high-oxygen-content samples of Y-Ba-Cu-O with negative thermopower, suggesting a common mechanism producing this behavior in Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} and the Cu-O-plane superconductors. Our sample with an activated temperature dependence of resistivity shows a change to positive thermopower before becoming superconducting, possibly due to the effect of nonmetallic grain boundaries.

Thermoelectric power ofBa1−xKxBiO3

We report measurements of thermoelectric power of two superconducting samples of Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} with differing resistivity behaviors. The thermopower is negative between 50 and 300 K. We find in both samples an unusual temperature dependence similar to that in high-oxygen-content samples of Y-Ba-Cu-O with negative thermopower, suggesting a common mechanism producing this behavior in Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} and the Cu-O-plane superconductors. Our sample with an activated temperature dependence of resistivity shows a change to positive thermopower before becoming superconducting, possibly due to the effect of nonmetallic grain boundaries.

Thermoelectric power of Ba 1 − x K x BiO 3

We report measurements of thermoelectric power of two superconducting samples of Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} with differing resistivity behaviors. The thermopower is negative between 50 and 300 K. We find in both samples an unusual temperature dependence similar to that in high-oxygen-content samples of Y-Ba-Cu-O with negative thermopower, suggesting a common mechanism producing this behavior in Ba{sub 1{minus}{ital x}}K{sub {ital x}}BiO{sub 3} and the Cu-O-plane superconductors. Our sample with an activated temperature dependence of resistivity shows a change to positive thermopower before becoming superconducting, possibly due to the effect of nonmetallic grain boundaries.