Intra-grain polarized infrared spectroscopy realized in domain-engineered Zn2GeO4 ceramics

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dc.creatorRoberto Luiz Moreira
dc.creatorAnderson Dias
dc.date.accessioned2023-11-28T17:54:27Z
dc.date.accessioned2025-09-08T23:54:14Z
dc.date.available2023-11-28T17:54:27Z
dc.date.issued2019
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológico
dc.description.sponsorshipFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas Gerais
dc.identifier.doihttps://doi.org/10.1016/j.materresbull.2019.110513
dc.identifier.issn0025-5408
dc.identifier.urihttps://hdl.handle.net/1843/61459
dc.languageeng
dc.publisherUniversidade Federal de Minas Gerais
dc.relation.ispartofMaterials Research Bulletin
dc.rightsAcesso Restrito
dc.subjectMaterial cerâmico
dc.subjectDifusão em sólidos
dc.subjectMicroestrutura
dc.subjectEspectroscopia de infravermelho
dc.subjectSemicondutores
dc.subjectSemicondutores policristalinos
dc.subject.otherCeramics
dc.subject.otherLattice dynamics
dc.subject.otherMicrostructure
dc.subject.otherInfrared spectroscopy
dc.subject.otherDielectric properties
dc.titleIntra-grain polarized infrared spectroscopy realized in domain-engineered Zn2GeO4 ceramics
dc.typeArtigo de periódico
local.citation.spage110513
local.citation.volume118
local.description.resumoIntra-grain infrared spectroscopy was carried out on a domain-engineered ceramic with abnormally large grains. The model system used was a polycrystalline Zn2GeO4 ceramic sample, with a rhombohedral crystal structure and giant grain microstructure (50–350 μm). The micro-infrared spectra unveiled preferential crystal orientations for the different grains. Polarized spectra revealed well-defined crystallographic domains inside the ceramic grains. Appropriate crystallographic planes for full assignment of the infrared modes were found by polarized infrared light. This allowed the first realization of a polarization-resolved symmetry assignment of an as-grown ceramic material. A sound description of the polar phonon features of rhombohedral Zn2GeO4 is then presented. Also, an infrared spectroscopic mapping of the crystallographic domains inside the ceramic grains is demonstrated.
local.identifier.orcidhttps://orcid.org/0000-0001-6820-0269
local.identifier.orcidhttps://orcid.org/0000-0001-7413-1087
local.publisher.countryBrasil
local.publisher.departmentICX - DEPARTAMENTO DE FÍSICA
local.publisher.departmentICX - DEPARTAMENTO DE QUÍMICA
local.publisher.initialsUFMG
local.url.externahttps://www.sciencedirect.com/science/article/pii/S0025540819306816

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