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Defect chemistry and dielectric properties of perovskite
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10.1063/1.2828149
/content/aip/journal/jap/103/1/10.1063/1.2828149
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/1/10.1063/1.2828149

Figures

Image of FIG. 1.
FIG. 1.

Solution energy of (per mol of ) oxides in orthorhombic according to different incorporation mechanisms. Squares: reaction (3). Circles: reaction (4). Diamonds: reaction (5). Triangles: reaction (6). Solid lines correspond to least-squares fit of data with a second order polynomial.

Image of FIG. 2.
FIG. 2.

Microstructure of ceramics. (a) Sample YB1, nominal composition , SEM, backscatter electron image, bar: . (b) Sample YB2, nominal composition , SEM, backscatter electron image bar: . (c) Sample YB2, nominal composition , OM, polarized light, after chemical etching, bar: . (d) Sample YB3, nominal composition , SEM, after thermal etching, bar: .

Image of FIG. 3.
FIG. 3.

(a) XRD patterns ( radiation) of the different ceramics. The patterns correspond to orthorhombic , space group . Peaks not assigned to are indicated. (b) Results of Rietveld refinement for sample YB3.

Image of FIG. 4.
FIG. 4.

Relative dielectric constant of ceramic YB1 with nominal composition .

Image of FIG. 5.
FIG. 5.

Relative dielectric constant of ceramic YB2 with nominal composition .

Image of FIG. 6.
FIG. 6.

Relative dielectric constant of ceramic YB3 with nominal composition .

Image of FIG. 7.
FIG. 7.

Loss tangent of ceramic YB3 with nominal composition .

Tables

Generic image for table
Table I.

Interatomic potential parameters for orthorhombic .

Generic image for table
Table II.

Lattice parameters and lattice properties of orthorhombic . Experimental data are at room temperature.

Generic image for table
Table III.

Structural parameters of and ceramics as obtained from Rietveld refinement. The first row reports the nominal composition and the second raw the composition taken from the Rietveld refinements. Values in brackets represent the eds on the last decimal digit. Whenever they are not present, the parameter has not been refined in that sample.

Generic image for table
Table IV.

Values of the parameters , , and (Barrett’s equation) for and ceramics at . is the Curie constant, is the Curie-Weiss temperature, and is the temperature of the crossover between classical and quantum behaviors.

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/content/aip/journal/jap/103/1/10.1063/1.2828149
2008-01-04
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Defect chemistry and dielectric properties of Yb3+:CaTiO3 perovskite
http://aip.metastore.ingenta.com/content/aip/journal/jap/103/1/10.1063/1.2828149
10.1063/1.2828149
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