Pressure dependence of the refractive index of monoclinic and yttria-stabilized cubic zirconia.
Pressure dependence of the refractive index of monoclinic and yttria-stabilized cubic zirconia.
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单斜晶系和氧化钇稳定的立方氧化锆的折射率与压力的关系。
DOI：
10.1103/physrevb.52.9266
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
da Jornada JA
中科院分区：
文献类型：
--
作者：
Balzaretti;da Jornada JA
单斜晶系和氧化钇稳定的立方氧化锆的折射率的压力依赖性测量高达3和8 GPa，分别使用干涉法与金刚石压砧单元。实验结果表明，这两种晶体结构的实际线性行为。对于立方氧化锆，折射率在压力下几乎保持恒定，而对于双轴单斜相，折射率的一个分量随压力减小而另一个分量随压力增大，尽管在相应的结晶方向上相当各向同性的晶格压缩。通过洛伦兹-洛伦兹关系研究氧离子的电子极化率的行为，得到以下Mueller参数：对于立方相Λ 0= 1.02，对于单斜相Λ 0= 1.05，对于几乎平行于B方向的分量，并且对于在样品平面上的“a”轴的投影方向上的分量，Λ 0= 0.85。在单斜氧化锆的情况下，在压力下的极化率的行为是约20%的各向异性比压缩的各自的晶格参数，表示一个独特的效果的原子间相互作用的氧离子的两个方向考虑。
The pressure dependence of the refractive index of monoclinic and yttria-stabilized cubic zirconia was measured up to 3 and 8 GPa, respectively, using an interferometric method with the diamond-anvil cell. The experimental results show a practically linear behavior for both crystalline structures. For cubic zirconia, the refractive index remains practically constant under pressure, while for the biaxial monoclinic phase, one component of the refractive index decreases and the other component increases with pressure, despite the rather isotropic lattice compression in the corresponding crystalline directions. The behavior of the electronic polarizability of the oxygen ion was investigated through the Lorentz-Lorenz relation, yielding the following Mueller parameters: for the cubic phase Λ 0= 1.02, and for the monoclinic phase Λ 0= 1.05 for the component nearly parallel to the b direction, and Λ 0= 0.85 for the component in the direction of the projection of the ‘‘a’’axis on the sample plane. In the case of monoclinic zirconia, the behavior of the polarizability under pressure is about 20% more anisotropic than the compression of the respective lattice parameters, indicating a distinct effect of the interatomic interactions over the oxygen ions for the two directions under consideration.