The atomic structure of disordered ion tracks in magnesium aluminate spinel

Kazuhiro Yasuda, Tomokazu Yamamoto, Syo Matsumura

Research output: Contribution to journalArticle

6 Citations (Scopus)

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 languageEnglish
Pages (from-to)27-30
Number of pages4
JournalJOM
Volume59
Issue number4
DOIs
Publication statusPublished - Apr 1 2007

Fingerprint

spinel
Magnesium
Heavy Ions
magnesium
Ions
Heavy ions
Cations
ion
Positive ions
Transmission electron microscopy
Electron spectroscopy
transmission electron microscopy
cation
Diffraction
Imaging techniques
diffraction
spectroscopy
aluminum magnesium oxide
spinell
electron

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology
  • Geotechnical Engineering and Engineering Geology
  • Materials Science(all)
  • Metals and Alloys

Cite this

The atomic structure of disordered ion tracks in magnesium aluminate spinel. / Yasuda, Kazuhiro; Yamamoto, Tomokazu; Matsumura, Syo.

In: JOM, Vol. 59, No. 4, 01.04.2007, p. 27-30.

Research output: Contribution to journalArticle

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