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, Brazil
  • 2Universidade Federal do Tocantins, Porto Nacional, Tocantins 77500-000, Brazil
  • 3Departamento de Física e Química, Universidade Estadual Paulista, Ilha Solteira – São Paulo 15385-000, Brazil
  • 4Department of Physics, Universitat Politècnica de Catalunya – BarcelonaTech, Barcelona 08034, Spain
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    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, 𝜀(E), 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, 𝜀(E), 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.

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    J. D. S. Guerra, C. A. Guarany, E. C. Lima, E. B. Araújo, J. E. Garcia. Exploring the electromechanical response and electric field-induced dielectric anomalies in PMN–PT electroceramics[J]. Journal of Advanced Dielectrics, 2021, 11(3): 2140005

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    Paper Information

    Category: Research Articles

    Received: Mar. 21, 2021

    Accepted: May. 11, 2021

    Published Online: Feb. 22, 2022

    The Author Email: Guerra J. D. S. (santos@ufu.br)

    DOI:10.1142/S2010135X21400051

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