| CONDENSED MATTER: STRUCTURE, MECHANICAL AND THERMAL PROPERTIES |
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Ne2+ Ion Irradiation Induced Swelling Effects in Pyrochlore Ho2Ti2O7 by Using a GIXRD Technique |
| LI Yu-Hong1,2**, XU Chun-Ping1, GAO Chao1, WANG Zhi-Guang2
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1School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000
2Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000
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LI Yu-Hong, XU Chun-Ping, GAO Chao et al 2011 Chin. Phys. Lett. 28 066102 |
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Abstract We carry out 400 keV Ne2+ ion irradiation damage experiments at cryogenic temperature (about 77 K) on polycrystalline Ho2Ti2O7 pyrochlore. The irradiation fluences range from 2×1014 to 1.3×1015 ions/cm2, corresponding to the peak ballistic displacement damage of 0.075–0.487 in units of displacement per atom (dpa). The value indicates the statistical average of the fractional number of lattice atoms which have experienced a lattice displacement. Irradiation−induced structural evolution is examined by using grazing incidence x-ray diffraction (GIXRD) at x-ray angles γ=0.25° and 3°. It is found that the irradiated layer is volumetrically swelled as compared with the underlying non-irradiated substrate and the volume increase in the irradiated layer is contributed mainly to the irradiated ion fluence.
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| Keywords:
61.82.-d
61.80.Jh
81.40.Wx
72.80.Ng
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Received: 09 March 2011
Published: 29 May 2011
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