Picht, Gunnar ; Webber, Kyle G. ; Zhang, Yining ; Kungl, Hans ; Damjanovic, Dragan ; Hoffmann, Michael J. (2012)
Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior.
In: Journal of Applied Physics, 112 (12)
doi: 10.1063/1.4767059
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Strain response of polycrystalline barium titanate (BaTiO3) was investigated under high unipolar electric field (0 to 4 kV/mm) and compressive stress (0 to 400 MPa) in the temperature range from 25 to 160 °C. In the vicinity of the Curie point (TC), nonlinear and hysteretic strain-electric field and strain-stress constitutive behaviors were observed, persisting above TC where they correspond to the well-known electric field induced double loop polarization behavior. Analogous to the electrical double loops, the mechanical (strain-stress) hysteretic behavior above TC is caused by a stress induced phase transition from the paraelectric/paraelastic to ferroelectric/ferroelastic phase; the electro-elastic (strain-electric field) hysteresis is similarly caused by an electric field induced phase transition. The stress and electric field at which transitions occur increase linearly with increasing temperature, exhibiting critical behavior typical for the first order phase transitions. The temperature limit for the induced phase transition extends up to 12 °C over TC. Results are discussed in relation to the Landau-Ginzburg-Devonshire free energy expansion.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2012 |
| Autor(en): | Picht, Gunnar ; Webber, Kyle G. ; Zhang, Yining ; Kungl, Hans ; Damjanovic, Dragan ; Hoffmann, Michael J. |
| Art des Eintrags: | Bibliographie |
| Titel: | Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Dezember 2012 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Journal of Applied Physics |
| Jahrgang/Volume einer Zeitschrift: | 112 |
| (Heft-)Nummer: | 12 |
| DOI: | 10.1063/1.4767059 |
| Kurzbeschreibung (Abstract): | Strain response of polycrystalline barium titanate (BaTiO3) was investigated under high unipolar electric field (0 to 4 kV/mm) and compressive stress (0 to 400 MPa) in the temperature range from 25 to 160 °C. In the vicinity of the Curie point (TC), nonlinear and hysteretic strain-electric field and strain-stress constitutive behaviors were observed, persisting above TC where they correspond to the well-known electric field induced double loop polarization behavior. Analogous to the electrical double loops, the mechanical (strain-stress) hysteretic behavior above TC is caused by a stress induced phase transition from the paraelectric/paraelastic to ferroelectric/ferroelastic phase; the electro-elastic (strain-electric field) hysteresis is similarly caused by an electric field induced phase transition. The stress and electric field at which transitions occur increase linearly with increasing temperature, exhibiting critical behavior typical for the first order phase transitions. The temperature limit for the induced phase transition extends up to 12 °C over TC. Results are discussed in relation to the Landau-Ginzburg-Devonshire free energy expansion. |
| Freie Schlagworte: | barium compounds, ferroelastic transitions, ferroelectric Curie temperature, ferroelectric materials, free energy, internal stresses, stress-strain relations |
| 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: | 24 Jan 2013 13:07 |
| Letzte Änderung: | 27 Feb 2014 14:50 |
| PPN: | |
| Sponsoren: | K.G.W. gratefully acknowledges the Deutsche Forschungsgemeinschaft for support under WE 4972/1-1. |
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