CEA, DEN, SRMA, Gif-sur Yvette, France.
J Phys Condens Matter. 2011 Mar 23;23(11):115902. doi: 10.1088/0953-8984/23/11/115902. Epub 2011 Feb 28.
We present an extensive study of point-defect creation in yttria-stabilized zirconia (ZrO(2):Y) exposed to 2.5 MeV electrons and various heavy ions (from C to U) covering an energy range from 100 MeV to several GeV. A synthesis of results from UV-visible optical absorption spectroscopy and electron paramagnetic resonance spectroscopy is provided with special emphasis on the respective roles of elastic collisions and electronic excitations. The colour centre production and recovery are the main focus in this survey. It is concluded that F(+)-type centres (involving singly ionized oxygen vacancies) are produced by elastic-collision processes. The large threshold displacement energy and defect volume hint that these colour centres might actually be small paramagnetic oxygen vacancy clusters, most probably divacancies (i.e. F(2)(+) centres). Such a picture is consistent with the (100) axial symmetry, inhomogeneous broadening of the optical absorption band, lack of hyperfine splitting, and weak spin-lattice coupling found for this defect.
我们对暴露于 2.5 MeV 电子和各种重离子（从 C 到 U）的钇稳定氧化锆（ZrO(2):Y）中产生点缺陷进行了广泛的研究，涵盖了从 100 MeV 到几 GeV 的能量范围。紫外线-可见光学吸收光谱和电子顺磁共振光谱的结果综合在一起，特别强调了弹性碰撞和电子激发的各自作用。在这项研究中，色心的产生和恢复是主要关注点。结论是，F(+)-型中心（涉及单离子化氧空位）是通过弹性碰撞过程产生的。大的位移能阈值和缺陷体积表明，这些色心实际上可能是小的顺磁氧空位簇，很可能是双空位（即 F(2)(+)中心）。这种情况与该缺陷的（100）轴向对称、光学吸收带的不均匀展宽、缺乏超精细分裂和弱自旋晶格耦合是一致的。
