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Abnormal temperature dependence of interband electronic transitions in relaxor-based ferroelectric ( and 0.31) single crystals
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10.1063/1.3560342
/content/aip/journal/apl/98/9/10.1063/1.3560342
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/9/10.1063/1.3560342
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Transmittance spectra for the (PMN-0:24PT) single crystal at the temperatures of 5.3 K, 150 K, and 300 K, respectively. The discontinuities of all the experimental data at 1.44 eV are due to the change in monochromator. The inset (a) shows XRD pattern of the PMN-0.24PT single crystal at room temperature. The inset (b) shows the transmittance spectra at temperatures of 5.3 and 300 K near the direct band gap.

Image of FIG. 2.
FIG. 2.

Transmittance spectra for the (PMN-0:31PT) single crystal at the temperatures of 5.3 K, 100 K, 150 K, 200 K, 250 K, and 300 K, respectively. The inset (a) shows XRD pattern of the PMN-0.31PT single crystal at room temperature. The inset (b) shows Raman spectra for the PMN-0.24PT and PMN-0.31PT single crystals recorded at room temperature.

Image of FIG. 3.
FIG. 3.

The variations in with the photon energy for the PMN-0:24PT and PMN-0.31PT single crystals measured at 5.3 and 300 K. The inset shows the variations in vs photon energy for the PMN-0.24PT and PMN-0.31PT crystals at 5.3 K and 300 K, respectively.

Image of FIG. 4.
FIG. 4.

The direct band gaps of the PMN-0:24PT and PMN-0.31PT crystals are varied with the temperature. The inset shows that the indirect band gap of the PMN-0.24PT crystal decreases with the temperature.

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/content/aip/journal/apl/98/9/10.1063/1.3560342
2011-03-03
2014-04-16
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Abnormal temperature dependence of interband electronic transitions in relaxor-based ferroelectric (1−x)Pb(Mg1/3Nb2/3)O3−xPbTiO3 (x=0.24 and 0.31) single crystals
http://aip.metastore.ingenta.com/content/aip/journal/apl/98/9/10.1063/1.3560342
10.1063/1.3560342
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