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Ferroelectrics Volume 611, 2023 - Issue 1
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Research Article

Low frequency dielectric dispersion in the AgNbO3 ferroelectric ceramic system

T. H. T. Rosaa Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, BrazilView further author information
,
A. C. Silvaa Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, BrazilView further author information
,
Y. Mendez-Gonzálezb Facultad de Física − Instituto de Ciencia y Tecnología de Materiales, Universidad de La Habana. San Lázaro y L, La Habana, CubaView further author information
,
R. Guoc 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, USAORCID Iconhttps://orcid.org/0000-0002-7661-6042View further author information
ORCID Icon,
A. S. Bhallac 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, USAView further author information
&
J. D. S. Guerraa Grupo de Ferroelétricos e Materiais Multifuncionais, Instituto de Física, Universidade Federal de Uberlândia, Uberlândia, BrazilCorrespondence[email protected]
ORCID Iconhttps://orcid.org/0000-0002-7906-4343View further author information
ORCID Icon
Pages 120-128 | Received 24 Jul 2022, Accepted 31 Mar 2023, Published online: 17 Jul 2023
 
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Abstract

Lead-free AgNbO3 ceramic system has been synthesized via solid-state reaction sintering method. High-density material has been obtained, revealing the formation of the pure perovskite structure, without secondary phases. Dielectric response showed three typical anomalies in the temperature dependence of the dielectric permittivity, with evident frequency-dependent dielectric dispersion for temperatures close to both the room temperature and the Curie temperature regions. Results have been analyzed and discussed within the framework of the theoretical models reported in the literature.

Additional information

Funding

The authors thank the National Council of Scientific and Technological Development (CNPq) grant 303447/2019-2, Minas Gerais Research Foundation (FAPEMIG) grants PPM-00661-16 and APQ-02875-18 and Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001 Brazilian agencies for the financial support, from Brazil, and ONR (N000141613096) and NSF (01002380) from the USA.

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