Journal of Advanced Dielectrics, Volume. 11, Issue 3, 2140005(2021)
Exploring the electromechanical response and electric field-induced dielectric anomalies in PMN–PT electroceramics
J. D. S. Guerra1、*, C. A. Guarany1, E. C. Lima2, E. B. Araújo3, and J. E. Garcia4
Author Affiliations
1Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais 38408-100, Brazil2Universidade Federal do Tocantins, Porto Nacional, Tocantins 77500-000, Brazil3Departamento de Física e Química, Universidade Estadual Paulista, Ilha Solteira – São Paulo 15385-000, Brazil4Department of Physics, Universitat Politècnica de Catalunya – BarcelonaTech, Barcelona 08034, Spainshow less
Electromechanical and dielectric properties of PMN–PT ferroelectric ceramics are investigated. In particular, dielectric response studies focus on the investigation of the influence of the DC applied electric field on the dielectric permittivity as a function of temperature and frequency. Results reveal an electric field driven dielectric anomaly in the dielectric permittivity curves, , which in turn prevails in the whole ferroelectric phase region and continuously vanishes for temperatures near the paraelectric-ferroelectric phase transition temperature. A schematic model for the domains dynamics of the studied material is proposed taking into account the simultaneous contribution of both 90 and 180 domains walls.Electromechanical and dielectric properties of PMN–PT ferroelectric ceramics are investigated. In particular, dielectric response studies focus on the investigation of the influence of the DC applied electric field on the dielectric permittivity as a function of temperature and frequency. Results reveal an electric field driven dielectric anomaly in the dielectric permittivity curves, , which in turn prevails in the whole ferroelectric phase region and continuously vanishes for temperatures near the paraelectric-ferroelectric phase transition temperature. A schematic model for the domains dynamics of the studied material is proposed taking into account the simultaneous contribution of both 90 and 180 domains walls.