High-pressure study of substrate material ScAlMgO 4
High-pressure study of substrate material ScAlMgO 4
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基体材料ScAlMgO 4 的高压研究
DOI：
10.1103/physrevb.83.144104
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发表时间：
2011
影响因子：
3.7
通讯作者：
E. Haussuehl
中科院分区：
文献类型：
--
作者：
D. Errandonea;R. Kumar;J. Ruiz;A. Segura;E. Haussuehl
我们报告的结构性能ScAlMgO4研究下准静水压力使用同步辐射高压X射线衍射高达40 GPa。我们还报告单晶研究ScAlMgO4在300 K和100 K。我们发现，低压相保持稳定，高达24 GPa。在28 GPa，我们检测到可逆相变。高压相被分配给低压相的单斜畸变。没有额外的相变观察到高达40 GPa。此外，状态方程，压缩张量，和热膨胀系数的ScAlMgO 4的确定。ScAlMgO_4的体积弹性模量为143（8）GPa，具有很强的压缩各向异性。对于三方低压相，沿c轴方向的压缩系数沿着方向的压缩系数是垂直于c轴方向的压缩系数的两倍。一个完美的晶格匹配与ZnO保持压力下的压力范围内的纤锌矿ZnO的稳定。
We report on the structural properties of ScAlMgO4 studied under quasi-hydrostatic pressure using synchrotron high-pressure x-ray diffraction up to 40 GPa. We also report on single-crystal studies of ScAlMgO4 performed at 300 K and 100 K. We found that the low-pressure phase remains stable up to 24 GPa. At 28 GPa, we detected a reversible phase transformation. The high-pressure phase is assigned to a monoclinic distortion of the low-pressure phase. No additional phase transition is observed up to 40 GPa. In addition, the equation of state, compressibility tensor, and thermal expansion coefficients of ScAlMgO4 are determined. The bulk modulus of ScAlMgO4 is found to be 143(8) GPa, with a strong compressibility anisotropy. For the trigonal low-pressure phase, the compressibility along the c-axis is twice than perpendicular one. A perfect lattice match with ZnO is retained under pressure in the pressure range of stability of wurtzite ZnO.