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Influence of Fe segregation at grain boundaries on the magnetoresistance of Sr2Fe1+δMoO6 polycrystals
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10.1063/1.4757026
/content/aip/journal/jap/112/7/10.1063/1.4757026
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/7/10.1063/1.4757026

Figures

Image of FIG. 1.
FIG. 1.

(a) X-ray diffraction pattern of the samples Sr2Fe1+δMoO6 (δ = 0.00 to 0.20. # shows the presence of Fe impurity peaks in the samples. (b) Rietveld fitting of x-ray diffraction pattern of the samples Sr2Fe1+δMoO6 (δ = 0.00 and 0.20). Inset of Fig. 1(b) clearly shows the presence of Fe impurity peaks in δ = 0.20 and SFMO-II samples.

Image of FIG. 2.
FIG. 2.

Scanning electron micrographs of Sr2Fe1+δMoO6 samples: a (δ = 0.00), b (δ = 0.10), and c (δ = 0.20). A and B represents the regions where EDX pattern has been recorded at the grain and grain boundary, respectively.

Image of FIG. 3.
FIG. 3.

Resistivity versus temperature plots for samples Sr2Fe1+δMoO6 (δ = 0.00-0.20).

Image of FIG. 4.
FIG. 4.

Magnetization versus applied magnetic field plots for the samples Sr2Fe1+δMoO6 (δ = 0.00-0.20) at 80 K. Inset shows the magnetization versus temperature plot for the sample δ = 0.00 and δ = 0.20 at applied magnetic field 2000 Oe.

Image of FIG. 5.
FIG. 5.

(a) Magnetoresistance versus applied magnetic field plots for the samples Sr2Fe1+δMoO6 (δ = 0.00-0.20) at 300 K. (b) Magnetoresistance versus applied magnetic field plots for the samples Sr2Fe1+δMoO6 (δ = 0.00-0.20) at 80 K. (c) Magnetoresistance versus applied magnetic field plots for the samples Sr2FeMoO6-II at 300 K and 80 K.

Tables

Generic image for table
Table I.

Different properties of the samples Sr2Fe1+δMoO6 (δ = 0.00-0.20) and SFMO-II sample.

Generic image for table
Table II.

Fe/Mo ratio (%) obtained through EDX analysis in Sr2Fe1+δ MoO6 (δ = 0.00, 0.10 and 0.20) samples at the grain (A) and grain boundary (B).

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/content/aip/journal/jap/112/7/10.1063/1.4757026
2012-10-11
2014-04-19
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Influence of Fe segregation at grain boundaries on the magnetoresistance of Sr2Fe1+δMoO6 polycrystals
http://aip.metastore.ingenta.com/content/aip/journal/jap/112/7/10.1063/1.4757026
10.1063/1.4757026
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