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Title: Ion-beam-induced spinel-to-rocksalt structural phase transformation in MgAl{sub 2}O{sub 4}

Abstract

An ion-beam-induced metastable phase in magnesium aluminate spinel (MgAl{sub 2}O{sub 4}) has been examined in detail using transmission electron microscopy. Single crystals of MgAl{sub 2}O{sub 4} with (111) orientation were irradiated with 180-keV Ne{sup +} ions at 120 K to fluences of 10{sup 16} and 10{sup 17}/cm{sup 2}. Selected-area electron diffraction patterns obtained from the irradiation-induced damaged layer revealed that all even hkl reflections (e.g., 222) possess strong intensity, while all odd hkl reflections (e.g., 111) are weak. The features of these diffraction patterns corresponded to those of the rocksalt (NaCl) structure, suggesting that an ordered spinel to disordered rocksalt structural phase transformation in MgAl{sub 2}O{sub 4} was induced by ion beam irradiation. (c) 2000 American Institute of Physics.

Authors:
 [1];  [1];  [1]
  1. Materials Science and Technology Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
Publication Date:
OSTI Identifier:
20216178
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 76; Journal Issue: 18; Other Information: PBD: 1 May 2000; Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; MAGNESIUM OXIDES; ALUMINIUM OXIDES; PHASE TRANSFORMATIONS; RADIATION EFFECTS; ION BEAMS; METASTABLE STATES; TRANSMISSION ELECTRON MICROSCOPY; NEON IONS; EXPERIMENTAL DATA

Citation Formats

Ishimaru, Manabu, Afanasyev-Charkin, Ivan V., and Sickafus, Kurt E. Ion-beam-induced spinel-to-rocksalt structural phase transformation in MgAl{sub 2}O{sub 4}. United States: N. p., 2000. Web. doi:10.1063/1.126406.
Ishimaru, Manabu, Afanasyev-Charkin, Ivan V., & Sickafus, Kurt E. Ion-beam-induced spinel-to-rocksalt structural phase transformation in MgAl{sub 2}O{sub 4}. United States. doi:10.1063/1.126406.
Ishimaru, Manabu, Afanasyev-Charkin, Ivan V., and Sickafus, Kurt E. Mon . "Ion-beam-induced spinel-to-rocksalt structural phase transformation in MgAl{sub 2}O{sub 4}". United States. doi:10.1063/1.126406.
@article{osti_20216178,
title = {Ion-beam-induced spinel-to-rocksalt structural phase transformation in MgAl{sub 2}O{sub 4}},
author = {Ishimaru, Manabu and Afanasyev-Charkin, Ivan V. and Sickafus, Kurt E.},
abstractNote = {An ion-beam-induced metastable phase in magnesium aluminate spinel (MgAl{sub 2}O{sub 4}) has been examined in detail using transmission electron microscopy. Single crystals of MgAl{sub 2}O{sub 4} with (111) orientation were irradiated with 180-keV Ne{sup +} ions at 120 K to fluences of 10{sup 16} and 10{sup 17}/cm{sup 2}. Selected-area electron diffraction patterns obtained from the irradiation-induced damaged layer revealed that all even hkl reflections (e.g., 222) possess strong intensity, while all odd hkl reflections (e.g., 111) are weak. The features of these diffraction patterns corresponded to those of the rocksalt (NaCl) structure, suggesting that an ordered spinel to disordered rocksalt structural phase transformation in MgAl{sub 2}O{sub 4} was induced by ion beam irradiation. (c) 2000 American Institute of Physics.},
doi = {10.1063/1.126406},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 18,
volume = 76,
place = {United States},
year = {2000},
month = {5}
}