The atomic structure of disordered ion tracks in magnesium aluminate spinel

Kazuhiro Yasuda; Tomokazu Yamamoto; Syo Matsumura

doi:10.1007/s11837-007-0050-3

The atomic structure of disordered ion tracks in magnesium aluminate spinel

Kazuhiro Yasuda, Tomokazu Yamamoto, Syo Matsumura

Research output: Contribution to journal › Article › peer-review

7 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 language	English
Pages (from-to)	27-30
Number of pages	4
Journal	JOM
Volume	59
Issue number	4
DOIs	https://doi.org/10.1007/s11837-007-0050-3
Publication status	Published - Apr 2007

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)

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title = "The atomic structure of disordered ion tracks in magnesium aluminate spinel",

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.",

author = "Kazuhiro Yasuda and Tomokazu Yamamoto and Syo Matsumura",

note = "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.",

year = "2007",

month = apr,

doi = "10.1007/s11837-007-0050-3",

language = "English",

volume = "59",

pages = "27--30",

journal = "Journal of Metals",

issn = "1047-4838",

publisher = "Minerals, Metals and Materials Society",

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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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JO - Journal of Metals

JF - Journal of Metals

SN - 1047-4838

IS - 4

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The atomic structure of disordered ion tracks in magnesium aluminate spinel

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