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First-principles study of disordering tendencies in Gd2B2O7 (B= Ti, Sn, Zr) compounds |
Chen Zhong-Jun(陈中钧)a)†, and Tian Dong-Bin(田东斌)b) |
a Department of Applied Physics, University of Electronic Science and Technology of China, Chengdu 610054, China; b School of Microelectronic and Solid-state Electronics,University of Electronic Science and Technology of China, Chengdu 610054, China |
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Abstract This paper performs the density functional theory calculations to obtain some factors influencing the response of pyrochlores Gd2B2O7 (B= Ti, Sn, Zr) to ion irradiation-induced amorphization. The 48f oxygen position parameter x, cohesive energy, bond type and defect-formation energy are discussed. The results show that parameter x can be used to indicate the disordering tendencies within a given pyrochlore family. Bond type, cohesive energy and defect-formation energies can be used to explain some experimental observations, but they are not determined exclusively by radiation ''resistance'' for a different pyrochlore family.
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Received: 09 May 2010
Revised: 07 July 2010
Accepted manuscript online:
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PACS:
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61.72.J-
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(Point defects and defect clusters)
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61.80.Jh
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(Ion radiation effects)
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61.82.Ms
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(Insulators)
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71.15.Mb
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(Density functional theory, local density approximation, gradient and other corrections)
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71.15.Nc
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(Total energy and cohesive energy calculations)
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71.20.Ps
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(Other inorganic compounds)
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Cite this article:
Chen Zhong-Jun(陈中钧), and Tian Dong-Bin(田东斌) First-principles study of disordering tendencies in Gd2B2O7 (B= Ti, Sn, Zr) compounds 2010 Chin. Phys. B 19 127101
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