中国物理B ›› 2013, Vol. 22 ›› Issue (5): 59101-059101.doi: 10.1088/1674-1056/22/5/059101
• GEOPHYSICS, ASTRONOMY, AND ASTROPHYSICS • 上一篇 下一篇
韩丹丹, 高伟, 李娜娜, 唐瑞莲, 李会, 马艳梅, 崔启良, 朱品文, 王欣
Han Dan-Dan (韩丹丹), Gao Wei (高伟), Li Na-Na (李娜娜), Tang Rui-Lian (唐瑞莲), Li Hui (李会), Ma Yan-Mei (马艳梅), Cui Qi-Liang (崔启良), Zhu Pin-Wen (朱品文), Wang Xin (王欣)
摘要: Structural and spectroscopic properties of Sr2ZnTeO6 (SZTO) were investigated by angle-dispersive synchrotron X-ray powder diffraction and Raman spectroscopy in a diamond anvil cell up to 31 GPa at room temperature. Although SZTO remained stable up to the highest pressure, the different pressure coefficients of the normalized axial compressibility were obtained as βab=8.16×10-3 GPa-1 and βc=7.61×10-3 GPa-1. The bulk modulus B0 was determined to be 190(1) GPa by fitting the pressure-volume data using the Birch-Murnaghan equation of state. All the observed Raman modes exhibited a broadening effect under high pressure. The vibrational band ϒ 1 around 765 cm-1, which is associated with the Te-O stretching mode in the basal plane of the TeO6 octahedron, had the largest pressure coefficient, and the Grüneisen parameters for all the observed phonon modes also were calculated and presented. These parameters could be used to measure the amount of uniaxial or biaxial strain, providing a fundamental tool for monitoring the magnitude of the shift of phonon frequencies with strains.
中图分类号: (High-pressure behavior)