TY - JOUR
T1 - Atomic structure and disordering induced by 350 MeV Au ions in MgAl2O4
AU - Yasuda, K.
AU - Yamamoto, T.
AU - Shimada, M.
AU - Matsumura, S.
AU - Chimi, Y.
AU - Ishikawa, N.
N1 - Funding Information:
The authors thank the staff of the HVEM laboratory of Kyushu University and Tandem ion accelerator facility of JAERI – Tokai for their technical supports and they thank Prof. Kinoshita for his encouragements and discussions. This work was supported in part by the Grant-in-Aid for Scientific Research (B) (#17360313) and for the Junior Scientist (#176199) from the Japan Society of Promotion of Science (JSPS).
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2006/9
Y1 - 2006/9
N2 - Microstructure change and atomic disordering in MgO · nAl2O3 (n = 1.1) irradiated with 350 MeV Au ions (Se = 35 keV/nm) were investigated through transmission electron microscopy (TEM) and high angular resolution electron channeling X-ray spectroscopy (HARECXS) techniques. High resolution TEM revealed that each ion track maintains crystalline structure. The core region of ion track is found to reveal a lattice fringe with a half period of spinel matrix, suggesting the phase transformation from spinel to rock-salt structure. HARECXS analysis clearly showed progress of cation disorder at a significantly large region of ∼10 nm in diameter. These results are compared with the previous results of 200 MeV Xe ion irradiated spinel (Se = 25 keV/nm). The structure of ion tracks is found to consist of three concentric circle structures: the defective core region (∼2 nm in diameter), strained region (∼5 nm) and cation disordered region (10-12 nm).
AB - Microstructure change and atomic disordering in MgO · nAl2O3 (n = 1.1) irradiated with 350 MeV Au ions (Se = 35 keV/nm) were investigated through transmission electron microscopy (TEM) and high angular resolution electron channeling X-ray spectroscopy (HARECXS) techniques. High resolution TEM revealed that each ion track maintains crystalline structure. The core region of ion track is found to reveal a lattice fringe with a half period of spinel matrix, suggesting the phase transformation from spinel to rock-salt structure. HARECXS analysis clearly showed progress of cation disorder at a significantly large region of ∼10 nm in diameter. These results are compared with the previous results of 200 MeV Xe ion irradiated spinel (Se = 25 keV/nm). The structure of ion tracks is found to consist of three concentric circle structures: the defective core region (∼2 nm in diameter), strained region (∼5 nm) and cation disordered region (10-12 nm).
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U2 - 10.1016/j.nimb.2006.04.164
DO - 10.1016/j.nimb.2006.04.164
M3 - Article
AN - SCOPUS:33746576391
VL - 250
SP - 238
EP - 244
JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
SN - 0168-583X
IS - 1-2 SPEC. ISS.
ER -