Journal article

Publication year: 2010

Pages: 14596-14608

Journal: Physical Chemistry Chemical Physics

Volume number: 12

Issue number: 43

ISSN: 1463-9076

eISSN: 1463-9084

DOI Link: https://doi.org/10.1039/c0cp01018a

Publisher: Royal Society of Chemistry

Abstract: 
Multilayer samples of the type (YSZ vertical bar Sc2O3) x n with layer thicknesses between 8 nm (n=100) and 250 nm (n=5) were prepared on (0001) sapphire substrates by pulsed laser deposition (PLD). The samples were characterised using X-ray diffraction (XRD), scanning electron microscopy (HRSEM) and transmission electron microscopy (TEM/HRTEM, SAED (selected-area electron diffraction) and quantitative EELS (electron energy-loss spectroscopy)). The polycrystalline layers show a columnar microstructure, which is typical for the used preparation technique. The layers are highly textured and only one axial orientation relation is found between yttria-stabilised zirconia (YSZ), scandium oxide and the substrate:(0001) Al2O3 parallel to(111) Sc2O3 parallel to(111) YSZA preferred orientation relationship also exists for the azimuthal rotation of the crystallites, which was demonstrated by SAED, XRD pole figure measurements and fast Fourier transformation (FFT) of HRTEM micrographs. The interfaces between YSZ, Sc2O3 and the substrate are sharp and do not contain diffuse transition regions. Dislocations appear not to be arranged in regular arrays. With increasing interface density (thinner individual layers in the multilayer), the conductivity of the multilayers decreases. We relate this to the negative nominal misfit present at the YSZ vertical bar Sc2O3 interfaces (compressive stress in YSZ at the phase boundaries). This observation agrees well with the previously investigated case of YSZ vertical bar Y2O3 (A. Peters et al., Phys. Chem. Chem. Phys., 2008, 10, 4623), where tensile misfit strain was present in YSZ at the phase boundaries, leading to a conductivity increase.

Harvard Citation style: Schichtel, N., Korte, C., Hesse, D., Zakharov, N., Butz, B., Gerthsen, D., et al. (2010) On the influence of strain on ion transport: microstructure and ionic conductivity of nanoscale YSZ vertical bar Sc2O3 multilayers, Physical Chemistry Chemical Physics, 12(43), pp. 14596-14608. https://doi.org/10.1039/c0cp01018a

APA Citation style: Schichtel, N., Korte, C., Hesse, D., Zakharov, N., Butz, B., Gerthsen, D., & Janek, J. (2010). On the influence of strain on ion transport: microstructure and ionic conductivity of nanoscale YSZ vertical bar Sc2O3 multilayers. Physical Chemistry Chemical Physics. 12(43), 14596-14608. https://doi.org/10.1039/c0cp01018a