Analysis of the suppression of the ferroelectric-paraeletric transition and its Curie's temperature in a doped host-structure niobate

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorUniversidade Federal do Rio Grande do Norte (UFRN)-
Autor(es): dc.creatorNobre, M. A.L.-
Autor(es): dc.creatorPraxedes, F. R.-
Autor(es): dc.creatorKaneko, U. F.-
Autor(es): dc.creatorIvashita, F. F.-
Autor(es): dc.creatorPaesano, A.-
Autor(es): dc.creatorLanfredi, S.-
Data de aceite: dc.date.accessioned2025-08-21T20:21:15Z-
Data de disponibilização: dc.date.available2025-08-21T20:21:15Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-04-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jpcs.2025.112578-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/300748-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/300748-
Descrição: dc.descriptionFe-doped potassium-strontium niobate solid solution with centrosymmetric space group was engineered from ferroelectric KSr2Nb5O15 host-structure, a classical structure with non-centrosymmetric space-group. A single-phase and crystalline solid solution was prepared via solid state reaction after mechanical mixture of oxides via High Energy Ball Milling. Structural properties of this non-stoichiometric solid solution were investigated by X-ray Diffraction, Raman spectroscopy, X-ray Absorption spectroscopy and Mössbauer spectroscopy. The analyses showed non-isovalent Fe3+ cations bi-site substitution on the Nb5+ cations octahedral sites. The development of a non-ferroelectric state (centrosymmetric) was observed from niobium substitution by Fe3+, suppressing ferroelectric-paraelectric phase transition. Further, the absence of Curie's temperature with a non-ferroelectric state was characterized by high-temperature Dielectric spectroscopy, from room temperature up to 965 K. Non-stoichiometric KSr2(FeNb4)O15-δ exhibited semiconductor character with negative temperature coefficient. Centrosymmetric space group and covalent character niobium oxygen bond stemming induction of non-polar ferroelectric configuration are discussed.-
Descrição: dc.descriptionLaboratório Nacional de Luz Síncrotron-
Descrição: dc.descriptionDepartment of Physics São Paulo State University (Unesp) School of Technology and Sciences, SP-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, SP-
Descrição: dc.descriptionInstitute of Biosciences Humanities and Exact Sciences São Paulo State University (Unesp), SP-
Descrição: dc.descriptionDepartment of Theoretical and Experimental Physics Universidade Federal do Rio Grande do Norte (UFRN), RN-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Geosciences and Exact Sciences, SP-
Descrição: dc.descriptionDepartment of Physics São Paulo State University (Unesp) School of Technology and Sciences, SP-
Descrição: dc.descriptionDepartment of Chemistry and Biochemistry São Paulo State University (Unesp) School of Technology and Sciences, SP-
Descrição: dc.descriptionInstitute of Biosciences Humanities and Exact Sciences São Paulo State University (Unesp), SP-
Descrição: dc.descriptionSão Paulo State University (UNESP) Institute of Geosciences and Exact Sciences, SP-
Idioma: dc.languageen-
Relação: dc.relationJournal of Physics and Chemistry of Solids-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCurie's temperature-
Palavras-chave: dc.subjectDielectric spectroscopy-
Palavras-chave: dc.subjectNiobate-
Palavras-chave: dc.subjectPhase transition-
Título: dc.titleAnalysis of the suppression of the ferroelectric-paraeletric transition and its Curie's temperature in a doped host-structure niobate-
Tipo de arquivo: dc.typelivro digital-
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