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Nonlinear conductivity of electronic origin in self-doped
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View: Figures


Image of FIG. 1.
FIG. 1.

Indexed XRD spectrum of pure (upper panel) and its SEM image (lower panel). Note the large grains and the melted grain boundaries.

Image of FIG. 2.
FIG. 2.

(a) Semilog plots of vs for and for . Bold lines consist of small symbols representing dense data points obtained from the automatic measuring system. Circles and triangles mark data points obtained from manual measurements; and squares mark extrapolated values obtained from pulsed measurements. Dotted lines are fitted lines representing activated transport. (b) vs for and for . The solid line represents a linear fit of S vs at the high temperatures.

Image of FIG. 3.
FIG. 3.

(a) Log-log plots of vs for at various temperatures. The data for a sample at 80 K were added for comparison. Symbols represent pulsed measurements and solid lines–dc measurements. Note the large hysteresis in the dc plots. Inset: the data for 90 K replotted on linear scale. (b) vs for at various temperatures. Solid lines represent lines fitted to the data points.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Nonlinear conductivity of electronic origin in self-doped LaMnO3+δ