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Swift heavy ion-induced phase transformation in Gd2O3

Lang, Maik and Zhang, Fuxiang and Zhang, Jiaming and Tracy, Cameron L. and Cusick, Alex B. and VonEhr, Jason and Chen, Zhiqiang and Trautmann, Christina and Ewing, Rodney C. (2014):
Swift heavy ion-induced phase transformation in Gd2O3.
In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, Elsevier Science Publishing, pp. 121-125, 326, ISSN 0168583X, [Online-Edition: http://dx.doi.org/10.1016/j.nimb.2013.10.073],
[Article]

Abstract

Crystalline-to-crystalline phase transformation of cubic Gd2O3 induced by swift Au ions with a kinetic energy of 2.25 GeV, has been characterized by synchrotron X-ray diffraction experiments (XRD) as a function of increasing fluence, up to 5 × 1013 ions/cm2. The diffraction maxima of the initial cubic structure gradually decrease in intensity as function of ion fluence, concurrent with the in-growth of several new diffraction peaks, which, based on Rietveld refinement, correspond to the monoclinic high-temperature phase. The same cubic-to-monoclinic phase transformation induced by swift heavy ions has been observed in Y2O3. The transformation pathway under irradiation is consistent with the high-temperature behavior of Gd2O3, and is probably associated with a multiple ion-impact mechanism. There was no evidence of amorphous material in the diffraction patterns, even after irradiation to the maximum fluence, at which the initial cubic phase has been completely transformed to the monoclinic structure.

Item Type: Article
Erschienen: 2014
Creators: Lang, Maik and Zhang, Fuxiang and Zhang, Jiaming and Tracy, Cameron L. and Cusick, Alex B. and VonEhr, Jason and Chen, Zhiqiang and Trautmann, Christina and Ewing, Rodney C.
Title: Swift heavy ion-induced phase transformation in Gd2O3
Language: English
Abstract:

Crystalline-to-crystalline phase transformation of cubic Gd2O3 induced by swift Au ions with a kinetic energy of 2.25 GeV, has been characterized by synchrotron X-ray diffraction experiments (XRD) as a function of increasing fluence, up to 5 × 1013 ions/cm2. The diffraction maxima of the initial cubic structure gradually decrease in intensity as function of ion fluence, concurrent with the in-growth of several new diffraction peaks, which, based on Rietveld refinement, correspond to the monoclinic high-temperature phase. The same cubic-to-monoclinic phase transformation induced by swift heavy ions has been observed in Y2O3. The transformation pathway under irradiation is consistent with the high-temperature behavior of Gd2O3, and is probably associated with a multiple ion-impact mechanism. There was no evidence of amorphous material in the diffraction patterns, even after irradiation to the maximum fluence, at which the initial cubic phase has been completely transformed to the monoclinic structure.

Journal or Publication Title: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms
Volume: 326
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Swift heavy ions, Sesquioxides, Gd2O3, Crystalline-to-crystalline phase transformations, X-ray diffraction
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Ion-Beam-Modified Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 12 Jan 2015 12:46
Official URL: http://dx.doi.org/10.1016/j.nimb.2013.10.073
Additional Information:

17th International Conference on Radiation Effects in Insulators (REI)

Identification Number: doi:10.1016/j.nimb.2013.10.073
Funders: The funding for this study was provided by the Office of Basic Energy Sciences of the USDOE (DE-FG02-97ER45656). , The use of the National Synchrotron Light Source at X17C station is supported by NSF COMPRES EAR01-35554 and by US-DOE contract DE-AC02-10886.
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