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Title: Order-disorder phase transformation in ion-irradiated rare earth sesquioxides

Abstract

An order-to-disorder (OD) transformation induced by ion irradiation in rare earth (RE) sesquioxides, Dy{sub 2}O{sub 3}, Er{sub 2}O{sub 3}, and Lu{sub 2}O{sub 3}, was studied using grazing incidence x-ray diffraction and transmission electron microscopy. These sesquioxides are characterized by a cubic C-type RE structure known as bixbyite. They were irradiated with heavy Kr{sup ++} ions (300 keV) and light Ne{sup +} ions (150 keV) at cryogenic temperature ({approx}120 K). In each oxide, following a relatively low ion irradiation dose of {approx}2.5 displacements per atom, the ordered bixbyite structure was transformed to a disordered, anion-deficient fluorite structure. This OD transformation was found in all three RE sesquioxides (RE=Dy, Er, and Lu) regardless of the ion type used in the irradiation. The authors discuss the irradiation-induced OD transformation process in terms of anion disordering, i.e., destruction of the oxygen order associated with the bixbyite structure.

Authors:
; ; ;  [1];  [2]
  1. Materials Science and Technology Division, Mail Stop G755, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
20960207
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 90; Journal Issue: 15; Other Information: DOI: 10.1063/1.2720716; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANIONS; ATOMIC DISPLACEMENTS; CUBIC LATTICES; DYSPROSIUM OXIDES; ERBIUM OXIDES; ION BEAMS; IRRADIATION; KEV RANGE 100-1000; KRYPTON IONS; LUTETIUM OXIDES; NEON IONS; ORDER-DISORDER TRANSFORMATIONS; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE 0065-0273 K; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION

Citation Formats

Tang, M., Valdez, J. A., Sickafus, K. E., Lu, P., and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801. Order-disorder phase transformation in ion-irradiated rare earth sesquioxides. United States: N. p., 2007. Web. doi:10.1063/1.2720716.
Tang, M., Valdez, J. A., Sickafus, K. E., Lu, P., & Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801. Order-disorder phase transformation in ion-irradiated rare earth sesquioxides. United States. doi:10.1063/1.2720716.
Tang, M., Valdez, J. A., Sickafus, K. E., Lu, P., and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801. Mon . "Order-disorder phase transformation in ion-irradiated rare earth sesquioxides". United States. doi:10.1063/1.2720716.
@article{osti_20960207,
title = {Order-disorder phase transformation in ion-irradiated rare earth sesquioxides},
author = {Tang, M. and Valdez, J. A. and Sickafus, K. E. and Lu, P. and Department of Materials and Metallurgical Engineering, New Mexico Institute of Mining and Technology, Socorro, New Mexico 87801},
abstractNote = {An order-to-disorder (OD) transformation induced by ion irradiation in rare earth (RE) sesquioxides, Dy{sub 2}O{sub 3}, Er{sub 2}O{sub 3}, and Lu{sub 2}O{sub 3}, was studied using grazing incidence x-ray diffraction and transmission electron microscopy. These sesquioxides are characterized by a cubic C-type RE structure known as bixbyite. They were irradiated with heavy Kr{sup ++} ions (300 keV) and light Ne{sup +} ions (150 keV) at cryogenic temperature ({approx}120 K). In each oxide, following a relatively low ion irradiation dose of {approx}2.5 displacements per atom, the ordered bixbyite structure was transformed to a disordered, anion-deficient fluorite structure. This OD transformation was found in all three RE sesquioxides (RE=Dy, Er, and Lu) regardless of the ion type used in the irradiation. The authors discuss the irradiation-induced OD transformation process in terms of anion disordering, i.e., destruction of the oxygen order associated with the bixbyite structure.},
doi = {10.1063/1.2720716},
journal = {Applied Physics Letters},
number = 15,
volume = 90,
place = {United States},
year = {Mon Apr 09 00:00:00 EDT 2007},
month = {Mon Apr 09 00:00:00 EDT 2007}
}