Local structure investigations of accumulated damage in irradiated MgAl2O4

Satoru Yoshioka, Konosuke Tsuruta, Tomokazu Yamamoto, Kazuhiro Yasuda, Syo Matsumura, Takeharau Sugiyama, Yojiro Oba, Norito Ishikawa, Eiichi Kobayashi, Koji Okudaira

研究成果: ジャーナルへの寄稿学術誌査読

2 被引用数 (Scopus)

抄録

Damaged structures in the MgAl2O4 spinel induced by swift heavy ions were investigated using the X-ray absorption near edge structure (XANES) and small angle X-ray scattering (SAXS). Increasing the fluence of 100 MeV Xe ions leads to increased SAXS intensity and XANES spectral changes on both Mg and Al K-edges. The damaged regions of ion tracks were observed by SAXS to be cylindrical in shape with a diameter of 5 nm. The theoretical XANES spectra indicated that the changes in the experimental spectra were due to the cationic disordering between tetrahedral and octahedral sites. This disordering caused an increase in the inversion degree of the cations. Furthermore, the quantitative analysis of the XANES spectra revealed the preferential occupation of cations at the octahedral sites at high fluence.

本文言語英語
ページ(範囲)4654-4663
ページ数10
ジャーナルJournal of the American Ceramic Society
103
8
DOI
出版ステータス出版済み - 8月 1 2020

!!!All Science Journal Classification (ASJC) codes

  • セラミックおよび複合材料
  • 材料化学

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