期刊
APPLIED PHYSICS LETTERS
卷 105, 期 5, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.4892364
关键词
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资金
- BMBF [05K10ODB, 03V0763, 05K10BRA]
- EU-STREP project in FP7 PLAISIR
Scattering scanning near-field optical microscopy (s-SNOM) has been established as an excellent tool to probe domains in ferroelectric crystals at room temperature. Here, we apply the s-SNOM possibilities to quantify low-temperature phase transitions in barium titanate single crystals by both temperature-dependent resonance spectroscopy and domain distribution imaging. The orthorhombic-to-tetragonal structural phase transition at 263 K manifests in a change of the spatial arrangement of ferroelectric domains as probed with a tunable free-electron laser. More intriguingly, the domain distribution unravels non-favored domain configurations upon sample recovery to room temperature as explainable by increased sample disorder. Ferroelectric domains and topographic influences are clearly deconvolved even at low temperatures, since complementing our s-SNOM nano-spectroscopy with piezoresponse force microscopy and topographic imaging using one and the same atomic force microscope and tip. (C) 2014 AIP Publishing LLC.
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