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Title: Near-field resonance shifts of ferroelectric barium titanate domains upon low-temperature phase transition

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.
Authors:
; ; ;  [1] ;  [2]
  1. Institut für Angewandte Photophysik, Technische Universität Dresden, George-Bähr-Straße 1, D-01069 Dresden (Germany)
  2. Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstraße 400, D-01328 Dresden (Germany)
Publication Date:
OSTI Identifier:
22314508
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 5; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMIC FORCE MICROSCOPY; BARIUM COMPOUNDS; FERROELECTRIC MATERIALS; FREE ELECTRON LASERS; MONOCRYSTALS; OPTICAL MICROSCOPY; PHASE TRANSFORMATIONS; SPECTROSCOPY; TITANATES