Journal
FERROELECTRICS
Volume 236, Issue 1-4, Pages 35-+Publisher
GORDON BREACH SCI PUBL LTD
DOI: 10.1080/00150190008016039
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In this contribution polarization sensitive modes of scanning force microscopy (SFM) and near-field optical microscopy (NSOM) are illustrated focussing on the aspect of domain wall resolution in ferroelectric, ferroelastic, and charged domain walls. For c-domain inspection bath friction force and dynamic force microscopy (DFM) are suitable, while the 3-dimensional polarization distribution from mixed a-e domains is obtained with voltage modulated SFM only. From such measurements, the smallest domain wall width of 8 nm was determined for 180 degrees domain walls separating twin domains in ferroelectric tri-glycine crystals. Domain wall mapping of ferroelectric BaTiO3 ceramics first results in a 25 nm width for ferroelastic domain walls. Second the effective crystallographic orientation of individual ferroelectric grains was deduced with respect to the sample normal, down to a 2 degrees angular resolution. Furthermore, non-contact DFM measurements in ultra-high vacuum are able to resolve ferroelectric surfaces down to the atomic scale.
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