Unveiling the magnetic and optical properties of barium bismuthate thin films with distinct Ba/Bi ratios

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorSchool of Engineering and Sciences-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorInstitute for Materials Science and Technology Research (INTEMA) (CONICET-National University of Mar del Plata) Juan B. Justo 4302-
Autor(es): dc.contributorFederal University of Itajuba-
Autor(es): dc.creatorAcero, G.-
Autor(es): dc.creatorPonce, M. A.-
Autor(es): dc.creatorMoura, F.-
Autor(es): dc.creatorSimões, A. Z.-
Data de aceite: dc.date.accessioned2025-08-21T18:24:36Z-
Data de disponibilização: dc.date.available2025-08-21T18:24:36Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2024-08-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.matchemphys.2024.129523-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/305102-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/305102-
Descrição: dc.descriptionThis research aims to investigate the optical and magnetic properties of BaBiO3 (80:20), BaBiO3 (50:50), and BaBiO3 (30:70) thin films obtained by the polymeric precursor method. For better sample designations, the following codes were employed: (80:20) (BBO82), (50:50) (BBO55), and (30:70) (BBO37). The observed properties for barium bismuthates thin films were elucidated in terms of bismuth and oxygen vacancies as well as grain morphology, which can be controlled by stoichiometric changes (Ba/Bi ratios). According to the x-ray results the films crystallize in a rhombohedral BaBiO3 structure with an R-3R space group without any secondary phase as confirmed by Rietveld analyses. According to the photoluminescence results, x-ray photoelectron spectroscopy measurements as well as the law of approach to saturation (LAS), there are a significant presence of oxygen vacancies and vacancy clusters [BiO5.Vo.] in the films with high proportion of bismuth. The optical and magnetic properties developed by these films are originated from the following factors: tilting of BiO6 clusters which changes the length and angle of Bi–O–Bi bonds, creating a magnetic field responsible for the distinct Mr/Ms ratios, the formation of bipolarons caused by charge transfer between [BiO6] and [BiO5. Vo⋅] due to the oxygen vacancies formation, plate-like morphology which makes the domains easier to be switched under an applied external field resulting in a superparamagnetic behavior, charge disproportionation of various valence states (Bi+3 and Bi+5). Based on these results, new potential devices can emerge as possible tools to be applied in switches, actuators, spintronics, magnetic field sensors, etc.-
Descrição: dc.descriptionUniversidade Estadual Paulista-
Descrição: dc.descriptionSchool of Engineering and Sciences-
Descrição: dc.descriptionSão Paulo State University – UNESP, SP-
Descrição: dc.descriptionInstitute for Materials Science and Technology Research (INTEMA) (CONICET-National University of Mar del Plata) Juan B. Justo 4302-
Descrição: dc.descriptionAdvanced Materials Interdisciplinary Laboratory Federal University of Itajuba, UNIFEI – Campus Itabira, MG-
Descrição: dc.descriptionSão Paulo State University – UNESP, SP-
Idioma: dc.languageen-
Relação: dc.relationMaterials Chemistry and Physics-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectBaBiO3-
Palavras-chave: dc.subjectChemical synthesis-
Palavras-chave: dc.subjectMagnetism-
Palavras-chave: dc.subjectPhotoluminescence-
Palavras-chave: dc.subjectThin films-
Título: dc.titleUnveiling the magnetic and optical properties of barium bismuthate thin films with distinct Ba/Bi ratios-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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