Ferroelectric characterization of aligned barium titanate nanofibres
authors Sa, P; Barbosa, J; Bdikin, I; Almeida, B; Rolo, AG; Gomes, ED; Belsley, M; Kholkin, AL; Isakov, D
nationality International
journal JOURNAL OF PHYSICS D-APPLIED PHYSICS
keywords PHASE-TRANSITIONS; 2ND-HARMONIC GENERATION; NANOCRYSTALLINE BATIO3; THIN-FILMS; CERAMICS; RAMAN
abstract We report the synthesis, structural and ferroelectric characterization of continuous well-aligned nanofibres of barium titanate produced by the electrospinning technique. The fibres with average diameter of 150-400 nm consist of connected nanoparticles of BaTiO3 stacked together to form the shape of a long filament. The tetragonal phase in the obtained nanofibres was revealed by the x-ray diffraction and Raman spectroscopy and has been also confirmed by the second harmonic generation (SHG) and piezoresponse force microscopy (PFM). The temperature dependence of the SHG in the vicinity of the paraelectric-ferroelectric phase transition suggests that barium titanate nanofibres are indeed ferroelectric with an apparent glass-like state caused by metastable polar nanoregions. The existence of domain structure and local switching studied by PFM present clear evidence of the polar phase at room temperature.
publisher IOP PUBLISHING LTD
issn 0022-3727
year published 2013
volume 46
issue 10
digital object identifier (doi) 10.1088/0022-3727/46/10/105304
web of science category Physics, Applied
subject category Physics
unique article identifier WOS:000315169500017

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