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A study of the phase diagram of determined by dielectric and piezoelectric measurements, and Raman spectroscopy
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10.1063/1.2752799
/content/aip/journal/jap/102/1/10.1063/1.2752799
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/1/10.1063/1.2752799
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

(Color online). X-ray diffraction spectra of KNLN with , showing a gradual appearance of traces of a secondary phase. The secondary phase peaks are marked by arrows. Peaks of the main phase reach a maximum of 3500 in intensity.

Image of FIG. 2.
FIG. 2.

(Color online) Temperature-composition phase diagram of solid solution for , based on dielectric permittivity, piezoelectric resonance, and Raman spectroscopy measurements of ceramic samples , revealing the presence an unknown phase which maintains a vertical boundary with the rhombohedral phase. A triple point where , , and phases meet is seen at around .

Image of FIG. 3.
FIG. 3.

(Color online) Temperature dependence of the relative permittivity of KNLN with and measured at . The inset shows enlarged region where phase transition occurs.

Image of FIG. 4.
FIG. 4.

(Color online) Temperature dependence of the radial mode resonant and antiresonant frequencies for KNLN samples with (a) and (b) . The arrows indicate positions of and phase transitions.

Image of FIG. 5.
FIG. 5.

(Color online) Raman spectra of KNLN sample with going through a sequence of phase transitions (a) , (b) , and (c) .

Image of FIG. 6.
FIG. 6.

(Color online) Fitted Raman spectra of KNLN sample with , where the circles are the raw experimental data, the triangles are Lorentzian fits of individual peaks, and the diamond shapes are the total spectrum calculated from fitted data. The lines are guides for the eye.

Image of FIG. 7.
FIG. 7.

(Color online) Width, intensity, and position of fitted Raman peaks as a function of temperature for KNLN sample with [(a) and (b)] and [(c) and (d)]. The vertical lines denote error bars.

Image of FIG. 8.
FIG. 8.

(Color online) Normalized Raman spectra of different compositions showing a phase transition around (a) at , (b) at , and no transitions at (c) and (d) .

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/content/aip/journal/jap/102/1/10.1063/1.2752799
2007-07-13
2014-04-20
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: A study of the phase diagram of (K,Na,Li)NbO3 determined by dielectric and piezoelectric measurements, and Raman spectroscopy
http://aip.metastore.ingenta.com/content/aip/journal/jap/102/1/10.1063/1.2752799
10.1063/1.2752799
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