Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior

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Details zur Publikation

Autor(en): Picht G, Webber K, Zhang Y, Kungl H, Damjanovic D, Hoffmann MJ
Zeitschrift: Journal of Applied Physics
Verlag: American Institute of Physics (AIP)
Jahr der Veröffentlichung: 2012
Band: 112
ISSN: 0021-8979


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 degrees C. In the vicinity of the Curie point (T-C), nonlinear and hysteretic strain-electric field and strain-stress constitutive behaviors were observed, persisting above T-C 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 T-C 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 degrees C over T-C. Results are discussed in relation to the Landau-Ginzburg-Devonshire free energy expansion. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4767059]



FAU-Autoren / FAU-Herausgeber

Webber, Kyle Prof.
Professur für Werkstoffwissenschaften (Funktionskeramik)


Autor(en) der externen Einrichtung(en)
École Polytechnique Fédérale de Lausanne (EPFL)
Karlsruhe Institute of Technology (KIT)
Technische Universität Darmstadt


Zitierweisen

APA:
Picht, G., Webber, K., Zhang, Y., Kungl, H., Damjanovic, D., & Hoffmann, M.J. (2012). Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior. Journal of Applied Physics, 112. https://dx.doi.org/10.1063/1.4767059

MLA:
Picht, Gunnar, et al. "Critical mechanical and electrical transition behavior of BaTiO3: The observation of mechanical double loop behavior." Journal of Applied Physics 112 (2012).

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Zuletzt aktualisiert 2018-08-08 um 18:39