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Origin of the dielectric response in Ba0.767Ca0.233TiO3
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10.1063/1.3693524
/content/aip/journal/apl/100/10/10.1063/1.3693524
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/10/10.1063/1.3693524
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Figures

Image of FIG. 1.
FIG. 1.

(Color online) (a) Schematic diagram of the X(Z,Y)-X scattering geometry for the Raman measurements, and (b) Raman spectra of BCTO-0.233 as a function of temperature. The spectral component due to the leakage of acoustic phonon is indicated by an open star.

Image of FIG. 2.
FIG. 2.

(Color online) Fitting examples for low frequency (<100 cm−1) spectra obtained at various temperatures.

Image of FIG. 3.
FIG. 3.

(Color online) Temperature dependences of the harmonic frequency ω 0 (open squares), the damping constant γ (circles), and the soft mode frequency ω s (open triangles). The shaded area indicates the temperature region of over-damped soft modes (ω 0 > γ).

Image of FIG. 4.
FIG. 4.

(Color online) Temperature dependences of (a) the dielectric permittivity and (b) the inverse of squared harmonic frequency.

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/content/aip/journal/apl/100/10/10.1063/1.3693524
2012-03-09
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Origin of the dielectric response in Ba0.767Ca0.233TiO3
http://aip.metastore.ingenta.com/content/aip/journal/apl/100/10/10.1063/1.3693524
10.1063/1.3693524
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