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Tunable electrical conductivity in nanoscale Gd-doped ceria thin films
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10.1063/1.2752028
/content/aip/journal/apl/90/26/10.1063/1.2752028
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/26/10.1063/1.2752028
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Equilibration of total electrical conductivity in thick 10% gadolinium doped ceria films in air at . Open circles are experimental points, solid line is a least square fit to a combination of two thermochemical kinetics of time constants and , and the individual components are shown as broken lines. The inset shows Nyquist impedance plots of film grown on MgO obtained after and stabilizations.

Image of FIG. 2.
FIG. 2.

Total electrical conductivity of 10% gadolinium doped ceria in air for bulk and thin film samples grown on sapphire (127 and ) and MgO . Curve A represents data obtained after sufficient long-time equilibration , at . Curve B represents transient values in air with a history of long-time homogenization at reducing conditions with subsequent reheating in air. Curve C represents data obtained during cooling cycle in air for samples which were partially reduced at an intermediate oxygen partial pressure .

Image of FIG. 3.
FIG. 3.

Partial pressure dependence of total conductivity at for (a) film grown on sapphire and (b) sample grown on MgO at different conditions. 440 and samples shown here were grown on sapphire. Curve A represents data obtained after sufficiently long-time equilibration, at . Curve B shows values obtained after short-time equilibration during reduction cycle for samples annealed for a long time in air, at . Curve C represents conductivity obtained at conditions close to conductivity maximum (see text).

Image of FIG. 4.
FIG. 4.

Total electrical conductivity of 10% gadolinium doped ceria thin films under reducing conditions. Curve A represents data obtained after sufficient long-time equilibration , at . Curve B represent values obtained after short-time equilibration. Curve C represents conductivity obtained at conditions close to conductivity maximum (see text).

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/content/aip/journal/apl/90/26/10.1063/1.2752028
2007-06-26
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tunable electrical conductivity in nanoscale Gd-doped ceria thin films
http://aip.metastore.ingenta.com/content/aip/journal/apl/90/26/10.1063/1.2752028
10.1063/1.2752028
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