Layer thickness and period as design parameters to tailor pyroelectric properties in ferroelectric superlattices
Mısırlıoğlu, Burç and Kesim, M. T. and Alpay, S. P. (2014) Layer thickness and period as design parameters to tailor pyroelectric properties in ferroelectric superlattices. Applied Physics Letters, 105 (17). ISSN 0003-6951 (Print) 1077-3118 (Online)
Official URL: http://dx.doi.org/10.1063/1.4900940
We theoretically examine the pyroelectric properties of ferroelectric-paraelectric superlattices as a function of layer thickness and configuration using non-linear thermodynamics coupled with electrostatic and electromechanical interactions between layers. We specifically study PbZr0.3Ti0.7O3/SrTiO3 superlattices. The pyroelectric properties of such constructs consisting of relatively thin repeating units are shown to exceed the pyroelectric response of monolithic PbZr0.3Ti0.7O3 films. This is related to periodic internal electric fields generated due to the polarization mismatch between layers that allows tailoring of the shift in the transition temperature. Our results indicate that higher and electric field sensitive pyroresponse can be achieved from layer-by-layer engineered ferroelectric heterostructures.
Repository Staff Only: item control page