Ne2+ Ion Irradiation Induced Swelling Effects in Pyrochlore Ho2Ti2O7 by Using a GIXRD Technique

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（6）
• 页码范围: 202-205
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/6/066102

摘要

We carry out 400 keV Ne<'2+> ion irradiation damage experiments at cryogenic temperature (about 77K) on poly- crystalline Ho<,2>Ti<,2>O<,7> pyrochlore.The irradiation fluences range from 2 × 10<'14> to 1.3 × 10<'15> ions/cm<'2>, 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 displace- ment.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.