Probing vacancies and structural distortions at individual defects in ceramics using EELS
- Univ. of Illinois, Chicago, IL (United States)
In electron energy loss spectroscopy (EELS), the near-edge region of a core-loss edge contains information on high-order atomic correlations. These correlations give details of the 3-D atomic structure which can be elucidated using multiple-scattering (MS) theory. MS calculations use real space clusters making them ideal for use in low-symmetry systems such as defects and interfaces. When coupled with the atomic spatial resolution capabilities of the scanning transmission electron microscope (STEM), there therefore exists the ability to obtain 3-D structural information from individual atomic scale structures. For ceramic materials where the structure-property relationships are dominated by defects and interfaces, this methodology can provide unique information on key issues such as like-ion repulsion and the presence of vacancies, impurities and structural distortion.
- OSTI ID:
- 468902
- Report Number(s):
- CONF-960877--; CNN: Grant DMR-9503877
- Country of Publication:
- United States
- Language:
- English
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