Effects of frequency, temperature, and dc bias electric field on the dielectric properties of methylammonium lead iodide from the perspective of a relaxor-like ferroelectric

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorScience and Technology of São Paulo-
Autor(es): dc.creatorMinussi, F. B. [UNESP]-
Autor(es): dc.creatorReis, S. P. [UNESP]-
Autor(es): dc.creatorAraújo, E. B. [UNESP]-
Data de aceite: dc.date.accessioned2022-08-04T22:11:55Z-
Data de disponibilização: dc.date.available2022-08-04T22:11:55Z-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2022-04-28-
Data de envio: dc.date.issued2021-10-15-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.actamat.2021.117235-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/222259-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/222259-
Descrição: dc.descriptionThis work reports dielectric properties of methylammonium lead iodide as a function of frequency, temperature, and dc bias electric field studied in terms of grain and grain boundary contributions. These results were analyzed from the perspective of a relaxor-like ferroelectric nature. The temperature dependence of dielectric permittivity at different frequencies showed a wide dispersion in the vicinity of the tetragonal-cubic phase transition, suggesting a relaxor ferroelectric feature after excluding artifacts as Maxwell-Wagner effects and dc contributions. The results from plots of the Vogel-Fulcher and the modified Curie-Weiss laws indicate the existence of a freezing temperature of the dipoles responsible for the relaxor character of the material (Tf ∼ 270 K) and a diffuse phase transition at high temperatures (γ ∼ 1.52-1.74). Measurements on heating and cooling protocols under a dc bias electric field suggest field-induced polarized domains like relaxor ferroelectric. The observed signatures of transitions between non-ergodic and ergodic relaxors to ferroelectric states were attributed to polar nano regions dynamics, suggesting a critical electric field around 0.03 kV cm−1.-
Descrição: dc.descriptionDepartment of Physics and Chemistry São Paulo State University-
Descrição: dc.descriptionFederal Institute of Education Science and Technology of São Paulo-
Descrição: dc.descriptionDepartment of Physics and Chemistry São Paulo State University-
Idioma: dc.languageen-
Relação: dc.relationActa Materialia-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectDielectric properties-
Palavras-chave: dc.subjectFerroelectricity-
Palavras-chave: dc.subjectHalide perovskite-
Palavras-chave: dc.subjectRelaxor-
Título: dc.titleEffects of frequency, temperature, and dc bias electric field on the dielectric properties of methylammonium lead iodide from the perspective of a relaxor-like ferroelectric-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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