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Further insights in the conductivity behavior of nanocrystalline
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10.1063/1.2404772
/content/aip/journal/jap/101/1/10.1063/1.2404772
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/1/10.1063/1.2404772

Figures

Image of FIG. 1.
FIG. 1.

X-ray diffraction pattern of samples (a) 7, (b) 8, (c) 9, and (d) 10.

Image of FIG. 2.
FIG. 2.

Transmission electron micrographs of the as synthesized samples (a) 7, (b) 8, (c) 9, and (d) 10.

Image of FIG. 3.
FIG. 3.

TG-DTG trace for the as synthesized samples (a) 7, (b) 8, (c) 9, and (d) 10.

Image of FIG. 4.
FIG. 4.

Sensor response of the as synthesized samples towards LPG. The resistance in LPG atmosphere decreases for samples 7 and 8, whereas the resistance increases for samples 9 and 10.

Image of FIG. 5.
FIG. 5.

Seebeck coefficient as a function of temperature for the as synthesized samples. Samples 7 and 8 show a negative coefficient (-type conduction), while 9 and 10 show a positive coefficient (-type conduction).

Image of FIG. 6.
FIG. 6.

Log vs plot for the as synthesized samples.

Image of FIG. 7.
FIG. 7.

Typical complex conductivity curve for sample 10. Inset shows the two semicircles. The points represent the data recorded, while the solid line is the fitted curve.

Image of FIG. 8.
FIG. 8.

Ni core level XPS spectra for (a) sample 7 and (b) sample 10. Lines represent the Gaussian fits, and the circles represent the recorded data.

Image of FIG. 9.
FIG. 9.

Magnetization vs applied field plots for the as synthesized samples at room temperature.

Image of FIG. 10.
FIG. 10.

Typical Mössbauer spectrum for the as synthesized samples showing the relaxed behavior.

Tables

Generic image for table
Table I.

Results from XRD, TEM, and VSM studies for the as synthesized samples.

Generic image for table
Table II.

Results from the compositional analyses (XPS and AAS), conductivity studies, thermoelectric power measurements, and gas sensing studies using LPG on .

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/content/aip/journal/jap/101/1/10.1063/1.2404772
2007-01-02
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Further insights in the conductivity behavior of nanocrystalline NiFe2O4
http://aip.metastore.ingenta.com/content/aip/journal/jap/101/1/10.1063/1.2404772
10.1063/1.2404772
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