Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 19, Issue 22, Pages 14319-14336Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7cp02017a
Keywords
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Funding
- EPSRC
- Marie Curie Research Grant [(FP7-PN274730)-IEF]
- [EP/H006060/1]
- Engineering and Physical Sciences Research Council [EP/M014142/1, EP/H006060/1] Funding Source: researchfish
- EPSRC [EP/M014142/1, EP/H006060/1] Funding Source: UKRI
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Enhanced conductivity in YSZ films has been of substantial interest over the last decade. In this paper we examine the effects of substrate lattice mismatch and film thickness on the strain in YSZ films and the resultant effect on the conductivity. 8 mol% YSZ films have been grown on MgO, Al2O3, LAO and NGO substrates, thereby controlling the lattice mismatch at the film/substrate interface. The thickness of the films was varied to probe the interfacial contribution to the transport properties, as measured by impedance spectroscopy and tracer diffusion. No enhancement in the transport properties of any of the films was found over single crystal values, and instead the effects of lattice strain were found to be minimal. The interfaces of all films were more resistive due to a heterogeneous distribution of grain boundaries, and no evidence for enhanced transport down dislocations was found.
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