Schader, Florian H. ; Aulbach, Emil ; Webber, Kyle G. ; Rossetti, George A. (2013)
Influence of uniaxial stress on the ferroelectric-to-paraelectric phase change in barium titanate.
In: Journal of Applied Physics, 113 (17)
doi: 10.1063/1.4799581
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
The dielectric behavior near the ferroelectric-to-paraelectric phase transition of 〈001〉C-oriented single crystal and polycrystalline barium titanate (BaTiO3) was investigated as a function of uniaxial compressive stress in the temperature range from 25 to 200 °C. An increase in the Curie point (TC) and decrease in the Curie-Weiss temperature (θ) were observed with increasing stress for both single crystal and polycrystalline samples, resulting in an increase in the first order nature of the phase transition as measured by the temperature difference (TC – θ). With increasing applied stress levels, the permittivity versus temperature curves of polycrystalline samples were found to broaden and flatten near the Curie point, which was not observed for the single crystals. The experimental results were analyzed using a classical 2-4-6 Landau polynomial. The observed increase in the first order nature of the ferroelectric-to-paraelectric phase transition with uniaxial stress was explained by a linear dependence of the quartic coefficient of the Landau series on stress.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2013 |
| Autor(en): | Schader, Florian H. ; Aulbach, Emil ; Webber, Kyle G. ; Rossetti, George A. |
| Art des Eintrags: | Bibliographie |
| Titel: | Influence of uniaxial stress on the ferroelectric-to-paraelectric phase change in barium titanate |
| Sprache: | Englisch |
| Publikationsjahr: | 7 Mai 2013 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 113 |
| (Heft-)Nummer: | 17 |
| DOI: | 10.1063/1.4799581 |
| Kurzbeschreibung (Abstract): | The dielectric behavior near the ferroelectric-to-paraelectric phase transition of 〈001〉C-oriented single crystal and polycrystalline barium titanate (BaTiO3) was investigated as a function of uniaxial compressive stress in the temperature range from 25 to 200 °C. An increase in the Curie point (TC) and decrease in the Curie-Weiss temperature (θ) were observed with increasing stress for both single crystal and polycrystalline samples, resulting in an increase in the first order nature of the phase transition as measured by the temperature difference (TC – θ). With increasing applied stress levels, the permittivity versus temperature curves of polycrystalline samples were found to broaden and flatten near the Curie point, which was not observed for the single crystals. The experimental results were analyzed using a classical 2-4-6 Landau polynomial. The observed increase in the first order nature of the ferroelectric-to-paraelectric phase transition with uniaxial stress was explained by a linear dependence of the quartic coefficient of the Landau series on stress. |
| Freie Schlagworte: | barium compounds, compressive strength, ferroelectric Curie temperature, ferroelectric materials, Landau levels, permittivity |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Elektromechanik von Oxiden 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Nichtmetallisch-Anorganische Werkstoffe |
| Hinterlegungsdatum: | 03 Mai 2013 10:41 |
| Letzte Änderung: | 27 Feb 2014 14:36 |
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