Transmission Electron Microscopy and Molecular Dynamic Study of Ion Tracks in Nanocrystalline Y<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>: Particle Size Effect on Track Formation Threshold
Structural effects in nanocrystalline pyrochlore Y<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> induced by high energy heavy ions in a wide range of electronic stopping powers were studied by means of high-resolution transmission electron microscopy and molecular dynami...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-10-01
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| Series: | Crystals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2073-4352/13/11/1534 |
| Summary: | Structural effects in nanocrystalline pyrochlore Y<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> induced by high energy heavy ions in a wide range of electronic stopping powers were studied by means of high-resolution transmission electron microscopy and molecular dynamics simulation considering the grain size effect. Ion track radii tend to saturate and even decrease at high electron stopping powers (>30 keV/nm) due to the velocity effect. The threshold electronic energy loss to form amorphous tracks in nanoclusters and large (>100 nm) crystals was estimated in the range 10.7–12.8 keV/nm. A strong size dependence was observed for smaller (<50 nm) isolated nanocrystals, with smaller crystals being significantly more sensitive to amorphous track formation. |
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| ISSN: | 2073-4352 |