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Tailoring non-linear dielectric properties by local field engineering in anisotropic porous ferroelectric structures
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10.1063/1.4729878
/content/aip/journal/apl/100/25/10.1063/1.4729878
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/25/10.1063/1.4729878
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Figures

Image of FIG. 1.
FIG. 1.

Local field and isopotential images for a structure with different porosity inclusions at the same applied voltage: (a) 1 pore, (b) 5 pores, and (c) 17 pores. The black lines represent the isopotential curves (the difference between two successive lines is , where is the total applied voltage). Note that local field intensity is represented in a color scale, the field direction is perpendicular on the isopotential lines and the lines are more agglomerated around the high field positions.

Image of FIG. 2.
FIG. 2.

Two virtual porous 2D structures (1 cm × 1 cm) with elongated pores in two geometries: (a) parallel and (d) perpendicular on the direction of the applied field; and the computed local fields under two different applied voltages: (b) and (e) and (c) and (f). Note that the local field intensity is represented in a color scale and the black lines are isopotential.

Image of FIG. 3.
FIG. 3.

Computed permittivity and tunability vs. the applied voltage for two porous configurations with pores long axis: (a) and (b) parallel; (d) and (e) perpendicular with respect to the applied field direction; and (c) and (f) distribution of the local fields on the ceramic volume in both configurations for the applied voltage of 20 kV.

Image of FIG. 4.
FIG. 4.

Experimental permittivity and dc-tunability vs. field for PZTN ceramics with anisotropic porosity levels, with long axis: (a), (c) parallel; (b), (e) perpendicular (with respect to the applied field direction; and (d) SEM picture of the PZTN surface with the highest porosity (40%), where the red electrodes represent the parallel configuration and blue electrodes represent the perpendicular configuration (bar: 500 μm).

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/content/aip/journal/apl/100/25/10.1063/1.4729878
2012-06-20
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Tailoring non-linear dielectric properties by local field engineering in anisotropic porous ferroelectric structures
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/25/10.1063/1.4729878
10.1063/1.4729878
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