TY - JOUR
T1 - The atomic structure of disordered ion tracks in magnesium aluminate spinel
AU - Yasuda, Kazuhiro
AU - Yamamoto, Tomokazu
AU - Matsumura, Syo
N1 - Funding Information:
Transmission-electron microscopy observations and analysis as well as ion-irradiation experiments were carried out at the High Voltage Electron Microscopy Laboratory of Kyushu University and at the Tandem ion accelerator facility of the Japan Atomic Energy Agency– Tokai, respectively. This work was supported in part by the Innovative Nuclear Research and Development Program by the Japanese Ministry of Education, Culture, Sports, Science and Technology and by Grant-in-Aid for Scientific Research (A) by the Japan Society for the Promotion of Science.
PY - 2007/4
Y1 - 2007/4
N2 - 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.
AB - 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.
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U2 - 10.1007/s11837-007-0050-3
DO - 10.1007/s11837-007-0050-3
M3 - Article
AN - SCOPUS:34548151821
SN - 1047-4838
VL - 59
SP - 27
EP - 30
JO - JOM
JF - JOM
IS - 4
ER -