Experimental evidence of charged domain walls in lead-free ferroelectric ceramics: light-driven nanodomain switching
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2018
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Nanoscale
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The control of ferroelectric domain walls at the nanometric level leads to novel interfacial properties and
functionalities. In particular, the comprehension of charged domain walls, CDWs, lies at the frontier of
future nanoelectronic research. Whereas many of the effects have been demonstrated for ideal archetypes,
such as single crystals, and/or thin films, a similar control of CDWs on polycrystalline ferroelectrics
has not been achieved. Here, we unambiguously show the presence of charged domain walls on a leadfree
(K,Na)NbO3 polycrystalline system. The appearance of CDWs is observed in situ by confocal Raman
microscopy and second harmonic generation microscopy. CDWs produce an internal strain gradient
within each domain. Specifically, the anisotropic strain develops a crucial piece in the ferroelectric
domain switching due to the coupling between the polarization of light and the ferroelectric polarization
of the nanodomain in the (K,Na)NbO3 ceramic. This effect leads to the tuning of the ferroelectric domain
switching by means of the light polarization angle. Our results will help to understand the relevance of
charged domain walls on the ferroelectric domain switching process and may facilitate the development
of domain wall nanoelectronics by remote light control utilizing polycrystalline ferroelectrics.
Como referenciar
RUBIO-MARCOS, FERNANDO; DEL CAMPO, ADOLFO; ROJAS-HERNANDEZ, ROCIO E.; RAMIREZ, MARIOLA O.; PARRA, RODRIGO; ICHIKAWA, RODRIGO U.; RAMAJO, LEANDRO A.; BAUSA, LUISA E.; FERNANDEZ, JOSE F. Experimental evidence of charged domain walls in lead-free ferroelectric ceramics: light-driven nanodomain switching. Nanoscale, v. 10, n. 2, p. 705-715, 2018. DOI: 10.1039/c7nr04304j. Disponível em: http://repositorio.ipen.br/handle/123456789/29068. Acesso em: 26 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.