X-ray diffraction study of HgBa2CuO4+delta at high pressures

被引：0

作者：

Gonzalez, EJ ^{[1
]}

WongNg, W ^{[1
]}

Piermarini, GJ ^{[1
]}

Wolters, C ^{[1
]}

Schwartz, J ^{[1
]}

机构：

[1] FLORIDA STATE UNIV, NATL HIGH MAGNET FIELD LAB, TALLAHASSEE, FL 32306 USA

来源：

POWDER DIFFRACTION | 1997年 / 12卷 / 02期

关键词：

D O I：

10.1017/S0885715600009544

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An in situ high pressure study using energy dispersive X-ray diffraction has been carried out on the polycrystalline high-T-c superconductor, HgBa2CuO4+delta (Hg-1201), to study its phase stability under pressure and also to measure its compressibility and bulk modulus. No evidence of pressure-induced polymorphism was found in the pressure range investigated, i.e., from 0.1 MPa (1 atm) to 5 GPa. The compound exhibited anisotropic elastic properties. The axial compressibility along the c axis was measured to be (3.96 +/- 0.35) x 10(-3) GPa(-1) and along the a axis (3.42 +/- 0.13) x 10(-3) GPa(-1), corresponding to an anisotropy ratio of 1.16 +/- 0.11. The bulk modulus was determined to be (94.7 +/- 4.2) GPa and, assuming a Poisson's ratio of 0.2, Young's modulus was estimated to be (170 +/- 8) GPa. (C) 1997 International Centre for Diffraction Data.

引用

页码：106 / 112

页数：7

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