@article{d11f339c32f5473894daded2aef18752,
title = "Local structure investigations of accumulated damage in irradiated MgAl2O4",
abstract = "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.",
author = "Satoru Yoshioka and Konosuke Tsuruta and Tomokazu Yamamoto and Kazuhiro Yasuda and Syo Matsumura and Takeharau Sugiyama and Yojiro Oba and Norito Ishikawa and Eiichi Kobayashi and Koji Okudaira",
note = "Funding Information: The SAXS and XAS experiments were performed with the approval of Kyushu University Beamline (Proposal Nos. 2016IIK015 and 2016IIIK005) and KEK‐PF (Proposal No. 2017G173) respectively. The ion irradiation was carried out at the JAEA Tokai tandem accelerator under the Cooperation Priority Research program. This work was supported by JSPS KAKENHI with by grant number JP16K06961 and JP19K05333. A portion of this work was also supported by the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, and the Impulsing Paradigm Change through the Disruptive Technologies (ImPACT) Program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). Funding Information: The SAXS and XAS experiments were performed with the approval of Kyushu University Beamline (Proposal Nos. 2016IIK015 and 2016IIIK005) and KEK-PF (Proposal No. 2017G173) respectively. The ion irradiation was carried out at the JAEA Tokai tandem accelerator under the Cooperation Priority Research program. This work was supported by JSPS KAKENHI with by grant number JP16K06961 and JP19K05333. A portion of this work was also supported by the Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, and the Impulsing Paradigm Change through the Disruptive Technologies (ImPACT) Program of the Council for Science, Technology and Innovation (Cabinet Office, Government of Japan). Publisher Copyright: {\textcopyright} 2020 The American Ceramic Society",
year = "2020",
month = aug,
day = "1",
doi = "10.1111/jace.17101",
language = "English",
volume = "103",
pages = "4654--4663",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "8",
}