Abstract
Equilibrium electrical conductivity and Seebeck coefficient measurements over the temperature range 500-800°C in YBa2Cu4O8 (Y-124) exhibit evidence for two distinct conduction mechanisms, one metallic and one activated. It is speculated that the metallic mechanism is associated with the Cu-O planes, whereas the activated mechanism is associated with the Cu-O chains, just as in YBa2Cu3O6+y (Y-123). Like the other superconducting cuprates, Y-124 electrical properties obey a standard relationship of Seebeck coefficient versus logarithm of conductivity. Analysis of behavior in Y-124 may provide useful insight into the electrical and superconducting behavior of the other cuprates, particularly Y-123.
Original language | English (US) |
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Pages (from-to) | 3-7 |
Number of pages | 5 |
Journal | Solid State Ionics |
Volume | 49 |
Issue number | C |
DOIs | |
State | Published - Dec 1991 |
Funding
This work was supported by the Northwestern University Materials Research Center under NSF-MRL Grant No. DMR-8821571.
ASJC Scopus subject areas
- General Chemistry
- General Materials Science
- Condensed Matter Physics