Abstract
Atomic resolution transmission-electron microscopy (TEM) observations and analysis have been undertaken on magnesium aluminate spinel to understand the structure of ion tracks induced by swift heavy ions. A combination of TEM techniques, which includes high-resolution and bright-field (BF) imaging, and high angular resolution electron channeling spectroscopy (HARECXS) analysis, disclosed the atomic structure of ion tracks. Swift heavy ions induce cation disordering along the latent tracks for a widespread region of 10 nm in diameter, which is much larger than a strained region detected by BF diffraction contrast. A preferential migration of cations is induced from the tetrahedral to octahedral interstitial site at the core regions of ion tracks under a condition of higher electronic excitation of (dE/dx)e = 35 keV/nm.
Original language | English |
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Pages (from-to) | 27-30 |
Number of pages | 4 |
Journal | JOM |
Volume | 59 |
Issue number | 4 |
DOIs | |
Publication status | Published - Apr 2007 |
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Engineering(all)