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Polymorphic phase boundaries and enhanced piezoelectric response in extended composition range in the lead free ferroelectric BaTi1−xZrxO3
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10.1063/1.4812472
/content/aip/journal/jap/114/1/10.1063/1.4812472
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812472

Figures

Image of FIG. 1.
FIG. 1.

Composition dependence of piezoelectric coefficient ( ) and remnant polarization () of Ba(TiZr)O. The data points shown by asterisk in the top panel are taken from Yu

Image of FIG. 2.
FIG. 2.

Temperature variation of relative permittivity of Ba(TiZr)O forthree representative compositions (a) x = 0.02, (b) 0.05, and (c)0.09. T, T, and T represent Curie point, orthorhombic-tetragonal and rhombohedral-orthorhombic transition temperatures, respectively. The y-axis in (c) is shown on a logarithmic scale to highlight the very weak anomaly corresponding to the rhombohedral-orthorhombic distortion. The phase diagram based on the dielectric study is shown in (d).

Image of FIG. 3.
FIG. 3.

Evolution of pseudocubic 400 and 331 neutron powder diffraction Bragg profiles of Ba(TiZr)O with composition. The arrows in (d) highlight the hump in the profile.

Image of FIG. 4.
FIG. 4.

Rietveld fits of the pseudocubic {400} and {331} neutron powder diffraction Bragg profiles of different compositions of Ba(TiZr)O. The dots represent the observed data, the continuous line is the fitted pattern, the vertical bars show the Bragg peak positions. The structural model used in each case is mentioned on the side of the figures.

Image of FIG. 5.
FIG. 5.

Composition dependence of lattice parameters, cell volume, and phase fractions. For the orthorhombic structure the pseudo-monoclinic lattice parameters have been plotted (see text). The subscripts T, O, R, and pm correspond to tetragonal, orthorhombic, rhombohedral, and pseudo-monoclinic cells, respectively.

Tables

Generic image for table
Table I.

Refined structural parameters and agreement factors for Ba(TiZr)O using Tetragonal(4) + orthorhombic(2) phase coexistence models.

Generic image for table
Table II.

Refined structural parameters and agreement factors for Ba(TiZr)O[7BZT] using the coexistence of orthorhombic(Amm2) and rhombohedral(R3m) space groups.

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/content/aip/journal/jap/114/1/10.1063/1.4812472
2013-07-01
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polymorphic phase boundaries and enhanced piezoelectric response in extended composition range in the lead free ferroelectric BaTi1−xZrxO3
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/1/10.1063/1.4812472
10.1063/1.4812472
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