Phase transitions in BaTiO3 under uniaxial compressive stress: Experiments and phenomenological analysis

Schader FH, Khakpash N, Rossetti GA, Webber KG (2017)

Publication Language: English

Publication Status: Published

Publication Type: Journal article

Publication year: 2017

Journal

Journal of Applied Physics AIP Publishing

Publisher: AMER INST PHYSICS

Book Volume: 121

Journal Issue: 6

DOI: 10.1063/1.4976060

Abstract

The relative permittivity of polycrystalline BaTiO3 was measured from -150 degrees C to 250 degrees C at compressive bias stresses up to -500 MPa. Mechanical loading shifted the rhombohedral-orthorhombic, orthorhombic-tetragonal, and tetragonal-cubic phase transition temperatures and produced a pronounced broadening of the dielectric softening in the vicinity of all three transitions. The inter-ferroelectric rhombohedral-orthorhombic and orthorhombic-tetragonal phase transitions were found to be less stress sensitive than the ferroelectric-paraelectric transition occurring between tetragonal and cubic phases at the Curie point. The application of compressive stress resulted in a strong suppression of the relative permittivity, such that at the highest applied stress of -500 MPa, the permittivity in the single phase regions away from the phase transitions was found to display only a weak dependence on temperature between -100 degrees C and 125 degrees C. The experimental observations closely followed the predictions of a 2-4-6 Landau polynomial wherein the dielectric stiffness and higher-order dielectric stiffness coefficients are linear functions of uniaxial stress. Published by AIP Publishing.

Authors with CRIS profile

Kyle Grant Webber Professur für Werkstoffwissenschaften (Funktionskeramik)

Involved external institutions

Technische Universität Darmstadt DE Germany (DE) University of Connecticut US United States (USA) (US)

How to cite

APA:

Schader, F.H., Khakpash, N., Rossetti, G.A., & Webber, K.G. (2017). Phase transitions in BaTiO3 under uniaxial compressive stress: Experiments and phenomenological analysis. Journal of Applied Physics, 121(6). https://dx.doi.org/10.1063/1.4976060

MLA:

Schader, Florian H., et al. "Phase transitions in BaTiO3 under uniaxial compressive stress: Experiments and phenomenological analysis." Journal of Applied Physics 121.6 (2017).

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