Characterization of YBa2Cu4O8 high temperature electrical properties and thermodynamic stability
- 1 October 1991
- journal article
- Published by Springer Nature in Journal of Materials Research
- Vol. 6 (10) , 2054-2058
- https://doi.org/10.1557/jmr.1991.2054
Abstract
Via in situ electrical property measurements (conductivity, Seebeck coefficient) over the temperature range 500–800 °C and oxygen partial pressure range 10−4-1 atm, the equilibrium transport properties and stability range of YBa2Cu4O8 were determined. YBa2Cu4O8 behaves like the intrinsically mixed-valent compound, magnetite (Fe3O4), with small variations in electrical properties with changes in oxygen partial pressure. The decomposition boundary to YBa2Cu3O6+y (or YBa2Cu3.5O7.5±z) and CuO occurs at log(po2, atm) = −1.24 × 104/T(K) + 11.01(773 ⋚ T(K) ⋚ 1073).Keywords
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