Journal article


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


Publication Details
Author(s): Schader FH, Khakpash N, Rossetti GA, Webber K
Publisher: AMER INST PHYSICS
Publication year: 2017
Volume: 121
Journal issue: 6
ISSN: 0021-8979
Language: English

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.



How to cite
APA: Schader, F.H., Khakpash, N., Rossetti, G.A., & Webber, K. (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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