A Study of 90° Ferroelectric Domains in Potassium Tantalate Niobate Crystals by Means of Transmission Electron Microscopy
| Autor: | Luchun Wang, Zhenshun Sha, Jiyang Wang, Guang‐jun Shen, Qi Li, Jianming Zhu, Huiping Xu, Duan Feng |
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| Rok vydání: | 1993 |
| Předmět: |
Flux method
Reflection high-energy electron diffraction Materials science Transmission electron microscopy General Physics and Astronomy Energy filtered transmission electron microscopy Selected area diffraction High-resolution transmission electron microscopy Ferroelectricity Molecular physics Tantalate |
| Zdroj: | Chinese Physics Letters. 10:298-301 |
| ISSN: | 1741-3540 0256-307X |
| DOI: | 10.1088/0256-307x/10/5/012 |
| Popis: | By flux method, potassium tantalate niobate crystals with 46% Nb contents were prepared. In this material 90° a-type domains with (011) and (01) walls were observed by a transmission electron microscope, and the nature of fringe patterns associated with these domain walls was analysed. According to the extinction rules for the domain walls, the displacement vector R along direction can be determined. Finally, using a selected area electron diffraction method, we examined the crystallographic character of these 90° domains and defined the ratio of lattice parameters c to a. |
| Databáze: | OpenAIRE |
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