Abstract
An enhanced thermal stability in thermoelectric Ca3Co4O9 thin films up to 550 °C in an oxygen rich environment was demonstrated by high-temperature electrical and X-ray diffraction measurements. In contrast to generally performed heating in helium gas, it is shown that an oxygen/helium mixture provides sufficient thermal contact, while preventing the previously disregarded formation of oxygen vacancies. Combining thermal cycling with electrical measurements proves to be a powerful tool to study the real intrinsic thermoelectric behaviour of oxide thin films at elevated temperatures
Original language | Undefined |
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Article number | 143903 |
Pages (from-to) | - |
Number of pages | 4 |
Journal | Applied physics letters |
Volume | 106 |
Issue number | 143903 |
DOIs | |
Publication status | Published - 2015 |
Keywords
- METIS-310457
- IR-96682