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Investigation of the conduction processes in PZT-based multiferroics: Analysis from Jonscher's formalism

Authors

  • J. D. S. Guerra,

    Corresponding author
    1. Multifunctional Electronic Materials and Devices Research Lab., Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX, USA
    2. Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais (MG), Brazil
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  • R. J. Portugal,

    1. Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais (MG), Brazil
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  • A. C. Silva,

    1. Departamento de Física e Química, Universidade Estadual Paulista, Ilha Solteira, São Paulo (SP), Brazil
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  • R. Guo,

    1. Multifunctional Electronic Materials and Devices Research Lab., Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX, USA
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  • A. S. Bhalla

    1. Multifunctional Electronic Materials and Devices Research Lab., Department of Electrical and Computer Engineering, College of Engineering, The University of Texas at San Antonio, San Antonio, TX, USA
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Abstract

The conductive processes in multiferroic ceramic composites based on PbZr0.65Ti0.35O3 (PZT) and BaFe12O19 (BaM), synthesized by the conventional solid-state reaction method, have been investigated. The DC and AC electrical conductivities have been analyzed in a wide temperature and frequency range and the influence of the BaM content on the electrical properties of the PZT–xBaM composites has been taken into account. It has been observed that the inclusion of the BaM in the PZT ferroelectric matrix promotes conduction mechanisms with magnetic-order characteristics on the ceramics, which were related to doubly ionized oxygen vacancies, superexchange, and double-exchange-type interactions. The obtained results are discussed in the framework of Jonscher's formalism.

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