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http://hdl.handle.net/1843/61459| Type: | Artigo de Periódico |
| Title: | Intra-grain polarized infrared spectroscopy realized in domain-engineered Zn2GeO4 ceramics |
| Authors: | Roberto Luiz Moreira Anderson Dias |
| Abstract: | Intra-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. |
| Subject: | Material cerâmico Difusão em sólidos Microestrutura Espectroscopia de infravermelho Semicondutores Semicondutores policristalinos |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICX - DEPARTAMENTO DE FÍSICA ICX - DEPARTAMENTO DE QUÍMICA |
| Rights: | Acesso Restrito |
| metadata.dc.identifier.doi: | https://doi.org/10.1016/j.materresbull.2019.110513 |
| URI: | http://hdl.handle.net/1843/61459 |
| Issue Date: | 2019 |
| metadata.dc.url.externa: | https://www.sciencedirect.com/science/article/pii/S0025540819306816 |
| metadata.dc.relation.ispartof: | Materials Research Bulletin |
| Appears in Collections: | Artigo de Periódico |
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